cbfstool: honor larger-than-usual header sizes in cbfs_add_entry_at()

If an earlier stage built a larger header, cbfs_add_entry_at() shouldn't
decide to go with the most boring, least featureful header type (and its size)
instead.

Change-Id: Icc5dcd9a797a0f3c42f91cddd21b3b3916095b63
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: http://review.coreboot.org/11217
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/util/cbfstool/cbfs_image.c b/util/cbfstool/cbfs_image.c
index ed065b0..b45969c 100644
--- a/util/cbfstool/cbfs_image.c
+++ b/util/cbfstool/cbfs_image.c
@@ -457,13 +457,13 @@
 			     const char *name,
 			     uint32_t type,
 			     const void *data,
-			     uint32_t content_offset)
+			     uint32_t content_offset,
+			     uint32_t header_size)
 {
 	struct cbfs_file *next = cbfs_find_next_entry(image, entry);
 	uint32_t addr = cbfs_get_entry_addr(image, entry),
 		 addr_next = cbfs_get_entry_addr(image, next);
-	uint32_t header_size = cbfs_calculate_file_header_size(name),
-		 min_entry_size = cbfs_calculate_file_header_size("");
+	uint32_t min_entry_size = cbfs_calculate_file_header_size("");
 	uint32_t len, target;
 	uint32_t align = image->has_header ? image->header.align :
 							CBFS_ENTRY_ALIGNMENT;
@@ -635,7 +635,8 @@
 		      addr, addr_next - addr, content_offset);
 
 		if (cbfs_add_entry_at(image, entry, buffer->size, name, type,
-				      buffer->data, content_offset) == 0) {
+				      buffer->data, content_offset,
+				      header_size) == 0) {
 			return 0;
 		}
 		break;