mb/amd/chausie: Correct naming of EC FW

Change the EC FW CBFS filename prefix to a more accurate "ec/"

TEST=build and boot chausie

Signed-off-by: Fred Reitberger <reitbergerfred@gmail.com>
Change-Id: Ib9ee24ca06b29c74cc0a91f9e4789df00ba1ba53
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69276
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jason Glenesk <jason.glenesk@gmail.com>

src/mainboard/amd/chausie/Kconfig

@@ -76,7 +76,7 @@ config RO_REGION_ONLY
 	depends on VBOOT_SLOTS_RW_AB || VBOOT_SLOTS_RW_A
 	# Add the EFS and EC to the RO region only
 	# This is a chausie-specific override of soc/amd/mendocino/Kconfig
-	default "apu/amdfw apu/ecfw"
+	default "apu/amdfw ec/ecfw"
 
 config CHROMEOS
 	# Use default libpayload config

src/mainboard/amd/chausie/Makefile.inc

@@ -26,10 +26,10 @@ CHAUSIE_EC_POSITION=$(call int-add, \
 	$(call int-subtract, 0xffffffff \
 	$(CONFIG_ROM_SIZE)) $(CONFIG_CHAUSIE_MCHP_FW_OFFSET) 1)
 
-cbfs-files-y += apu/ecfw
-apu/ecfw-file := $(CONFIG_CHAUSIE_MCHP_FW_FILE)
-apu/ecfw-position := $(CHAUSIE_EC_POSITION)
-apu/ecfw-type := raw
+cbfs-files-y += ec/ecfw
+ec/ecfw-file := $(CONFIG_CHAUSIE_MCHP_FW_FILE)
+ec/ecfw-position := $(CHAUSIE_EC_POSITION)
+ec/ecfw-type := raw
 
 else
 files_added:: warn_no_mchp