mb/amd/majolica: add fmd for use when building chromeos

BUG=b:177909472
TEST=builds

Change-Id: I5eb3c60fe60e4029485fae642c88c5c013ffb3f6
Signed-off-by: Mathew King <mathewk@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50208
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/amd/majolica/Kconfig

@@ -10,6 +10,7 @@ config BOARD_SPECIFIC_OPTIONS
 
 config FMDFILE
 	string
+	default "src/mainboard/amd/majolica/chromeos.fmd" if CHROMEOS
 	default "src/mainboard/amd/majolica/board.fmd"
 
 config MAINBOARD_DIR

src/mainboard/amd/majolica/chromeos.fmd

@@ -0,0 +1,14 @@
+FLASH@0xFF000000 16M {
+	BIOS {
+		EC 128K
+		RW_MRC_CACHE 64K
+		RW_LEGACY(CBFS) 4K
+		FW_MAIN_A(CBFS) 1M
+		VBLOCK_A 8K
+		FW_MAIN_B(CBFS) 1M
+		VBLOCK_B 8K
+		SHARED_DATA 8K
+		FMAP 4K
+		COREBOOT(CBFS)
+	}
+}