util/spd_tools: Update Makefile.inc references to Makefile.mk

Make sure that any new files generated get the Makefile.mk name.

Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: I3880d5911ff8de01751befdffc99ba5a961416f7
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80113
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <ericllai@google.com>
diff --git a/util/spd_tools/README.md b/util/spd_tools/README.md
index bed3460..e7772c9 100644
--- a/util/spd_tools/README.md
+++ b/util/spd_tools/README.md
@@ -25,7 +25,7 @@
     maps each supported platform to one of these sets.
 *   `part_id_gen`: This tool allocates DRAM strap IDs for the different memory
     parts used by a board. It takes as input a CSV file of the memory parts used
-    with optional fixed IDs. It generates a Makefile.inc which is used to
+    with optional fixed IDs. It generates a Makefile.mk which is used to
     integrate the SPD files generated by `spd_gen` into the coreboot build.
 
 ## Tool 1 - `spd_gen`
@@ -465,7 +465,7 @@
 
 *   1) The SoC platform which the board is based on, e.g. ADL.
 *   2) The memory technology used by the board, One of ddr4, lp4x, or lp5.
-*   3) The path to the directory where the generated Makefile.inc should be placed.
+*   3) The path to the directory where the generated Makefile.mk should be placed.
 *   4) A CSV file containing a list of the memory parts used by the board, with an
         optional fixed or exclusive ID for each part and an optional SPD override file.
         A fixed ID is simply an integer and it ensure that part (and any that share the
@@ -503,14 +503,14 @@
 
 *   It prints the DRAM hardware strap ID which should be allocated to each
     memory part in the input file.
-*   It generates a `Makefile.inc` in the given directory. This is used to
+*   It generates a `Makefile.mk` in the given directory. This is used to
     integrate the SPD files generated by `spd_gen` with the coreboot build for
     the board.
 *   It generates a `dram_id.generated.txt` in the same directory as the
-    `Makefile.inc`. This lists the part IDs assigned to each memory part, and is
+    `Makefile.mk`. This lists the part IDs assigned to each memory part, and is
     useful for itegration with the board schematics.
 
-Sample `Makefile.inc`:
+Sample `Makefile.mk`:
 
 ```
 # SPDX-License-Identifier: GPL-2.0-or-later
@@ -607,9 +607,9 @@
 *   Update the file containing the memory parts used by board (variant), by
     adding the new memory part name at the end of the file.
 
-    *   Use `part_id_gen` to update the variant's `Makefile.inc` and
+    *   Use `part_id_gen` to update the variant's `Makefile.mk` and
         `dram_id.generated.txt` with the new part.
-    *   Upload the changes to `Makefile.inc` and `dram_id.generated.txt` for
+    *   Upload the changes to `Makefile.mk` and `dram_id.generated.txt` for
         review.
 
 ## How to add support for a new memory technology
diff --git a/util/spd_tools/src/part_id_gen/part_id_gen.go b/util/spd_tools/src/part_id_gen/part_id_gen.go
index 699905d..719cfd53 100644
--- a/util/spd_tools/src/part_id_gen/part_id_gen.go
+++ b/util/spd_tools/src/part_id_gen/part_id_gen.go
@@ -20,7 +20,7 @@
  * It expects the following inputs:
  *  Name of the SoC platform, e.g. TGL.
  *  Memory technology used by the variant, e.g. lp4x.
- *  Path to Makefile directory. Makefile.inc generated by this program is placed in this
+ *  Path to Makefile directory. Makefile.mk generated by this program is placed in this
  *  location.
  *  Text file containing a list of memory part names used by the board. Each line in the file
  *  is expected to have one memory part name.
@@ -29,7 +29,7 @@
 	SPDManifestFileName       = "parts_spd_manifest.generated.txt"
 	PlatformsManifestFileName = "platforms_manifest.generated.txt"
 	SPDEmptyFileName          = "spd-empty.hex"
-	MakefileName              = "Makefile.inc"
+	MakefileName              = "Makefile.mk"
 	DRAMIdFileName            = "dram_id.generated.txt"
 	MaxMemoryId               = 15
 )
@@ -58,7 +58,7 @@
 	fmt.Printf("              supported platforms: %v\n", supportedPlatforms)
 	fmt.Printf("   mem_technology = Memory technology used by the board\n")
 	fmt.Printf("                    supported technologies: %v\n", supportedMemTechs)
-	fmt.Printf("   makefile_dir = Directory path where generated Makefile.inc should be placed\n")
+	fmt.Printf("   makefile_dir = Directory path where generated Makefile.mk should be placed\n")
 	fmt.Printf("   mem_parts_used_file = CSV file containing list of memory parts used by the board and optional fixed ids\n\n\n")
 }
 
@@ -410,7 +410,7 @@
 }
 
 /*
- * This function generates Makefile.inc under the variant directory path and adds assigned SPDs
+ * This function generates Makefile.mk under the variant directory path and adds assigned SPDs
  * to SPD_SOURCES.
  */
 func genMakefile(partIdList []partIds, makefileDirName string, SPDDir string, partsDir string) error {