romfile-loader: Switch to using named structs

This is a little cleaner and matches how the command structures are
defined in QEMU.

Signed-off-by: Ben Warren <ben@skyportsystems.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
(cherry picked from commit e5bebc77d2a9dfa67cda100b67d787c3ebdb5397)
diff --git a/src/fw/romfile_loader.c b/src/fw/romfile_loader.c
index f4b17ff..7737453 100644
--- a/src/fw/romfile_loader.c
+++ b/src/fw/romfile_loader.c
@@ -35,12 +35,12 @@
     struct romfile_loader_file *file = &files->files[files->nfiles];
     void *data;
     int ret;
-    unsigned alloc_align = le32_to_cpu(entry->alloc_align);
+    unsigned alloc_align = le32_to_cpu(entry->alloc.align);
 
     if (alloc_align & (alloc_align - 1))
         goto err;
 
-    switch (entry->alloc_zone) {
+    switch (entry->alloc.zone) {
         case ROMFILE_LOADER_ALLOC_ZONE_HIGH:
             zone = &ZoneHigh;
             break;
@@ -52,9 +52,9 @@
     }
     if (alloc_align < MALLOC_MIN_ALIGN)
         alloc_align = MALLOC_MIN_ALIGN;
-    if (entry->alloc_file[ROMFILE_LOADER_FILESZ - 1])
+    if (entry->alloc.file[ROMFILE_LOADER_FILESZ - 1])
         goto err;
-    file->file = romfile_find(entry->alloc_file);
+    file->file = romfile_find(entry->alloc.file);
     if (!file->file || !file->file->size)
         return;
     data = _malloc(zone, file->file->size, alloc_align);
@@ -80,24 +80,24 @@
 {
     struct romfile_loader_file *dest_file;
     struct romfile_loader_file *src_file;
-    unsigned offset = le32_to_cpu(entry->pointer_offset);
+    unsigned offset = le32_to_cpu(entry->pointer.offset);
     u64 pointer = 0;
 
-    dest_file = romfile_loader_find(entry->pointer_dest_file, files);
-    src_file = romfile_loader_find(entry->pointer_src_file, files);
+    dest_file = romfile_loader_find(entry->pointer.dest_file, files);
+    src_file = romfile_loader_find(entry->pointer.src_file, files);
 
     if (!dest_file || !src_file || !dest_file->data || !src_file->data ||
-        offset + entry->pointer_size < offset ||
-        offset + entry->pointer_size > dest_file->file->size ||
-        entry->pointer_size < 1 || entry->pointer_size > 8 ||
-        entry->pointer_size & (entry->pointer_size - 1))
+        offset + entry->pointer.size < offset ||
+        offset + entry->pointer.size > dest_file->file->size ||
+        entry->pointer.size < 1 || entry->pointer.size > 8 ||
+        entry->pointer.size & (entry->pointer.size - 1))
         goto err;
 
-    memcpy(&pointer, dest_file->data + offset, entry->pointer_size);
+    memcpy(&pointer, dest_file->data + offset, entry->pointer.size);
     pointer = le64_to_cpu(pointer);
     pointer += (unsigned long)src_file->data;
     pointer = cpu_to_le64(pointer);
-    memcpy(dest_file->data + offset, &pointer, entry->pointer_size);
+    memcpy(dest_file->data + offset, &pointer, entry->pointer.size);
 
     return;
 err:
@@ -108,12 +108,12 @@
                                         struct romfile_loader_files *files)
 {
     struct romfile_loader_file *file;
-    unsigned offset = le32_to_cpu(entry->cksum_offset);
-    unsigned start = le32_to_cpu(entry->cksum_start);
-    unsigned len = le32_to_cpu(entry->cksum_length);
+    unsigned offset = le32_to_cpu(entry->cksum.offset);
+    unsigned start = le32_to_cpu(entry->cksum.start);
+    unsigned len = le32_to_cpu(entry->cksum.length);
     u8 *data;
 
-    file = romfile_loader_find(entry->cksum_file, files);
+    file = romfile_loader_find(entry->cksum.file, files);
 
     if (!file || !file->data || offset >= file->file->size ||
         start + len < start || start + len > file->file->size)
diff --git a/src/fw/romfile_loader.h b/src/fw/romfile_loader.h
index 15eab2a..bce3719 100644
--- a/src/fw/romfile_loader.h
+++ b/src/fw/romfile_loader.h
@@ -11,45 +11,45 @@
     u32 command;
     union {
         /*
-         * COMMAND_ALLOCATE - allocate a table from @alloc_file
-         * subject to @alloc_align alignment (must be power of 2)
-         * and @alloc_zone (can be HIGH or FSEG) requirements.
+         * COMMAND_ALLOCATE - allocate a table from @alloc.file
+         * subject to @alloc.align alignment (must be power of 2)
+         * and @alloc.zone (can be HIGH or FSEG) requirements.
          *
          * Must appear exactly once for each file, and before
          * this file is referenced by any other command.
          */
         struct {
-            char alloc_file[ROMFILE_LOADER_FILESZ];
-            u32 alloc_align;
-            u8 alloc_zone;
-        };
+            char file[ROMFILE_LOADER_FILESZ];
+            u32 align;
+            u8 zone;
+        } alloc;
 
         /*
          * COMMAND_ADD_POINTER - patch the table (originating from
-         * @dest_file) at @pointer_offset, by adding a pointer to the table
+         * @dest_file) at @pointer.offset, by adding a pointer to the table
          * originating from @src_file. 1,2,4 or 8 byte unsigned
-         * addition is used depending on @pointer_size.
+         * addition is used depending on @pointer.size.
          */
         struct {
-            char pointer_dest_file[ROMFILE_LOADER_FILESZ];
-            char pointer_src_file[ROMFILE_LOADER_FILESZ];
-            u32 pointer_offset;
-            u8 pointer_size;
-        };
+            char dest_file[ROMFILE_LOADER_FILESZ];
+            char src_file[ROMFILE_LOADER_FILESZ];
+            u32 offset;
+            u8 size;
+        } pointer;
 
         /*
          * COMMAND_ADD_CHECKSUM - calculate checksum of the range specified by
-         * @cksum_start and @cksum_length fields,
+         * @cksum.start and @cksum.length fields,
          * and then add the value at @cksum_offset.
          * Checksum simply sums -X for each byte X in the range
          * using 8-bit math.
          */
         struct {
-            char cksum_file[ROMFILE_LOADER_FILESZ];
-            u32 cksum_offset;
-            u32 cksum_start;
-            u32 cksum_length;
-        };
+            char file[ROMFILE_LOADER_FILESZ];
+            u32 offset;
+            u32 start;
+            u32 length;
+        } cksum;
 
         /* padding */
         char pad[124];