soc/amd/*/Makefile.inc: Do some cosmetics

The first target for the add_intermediate targets is always
$(obj)/coreboot.pre.

Change-Id: Iea2322ca1abd43900f3631b7965f07fed4235ca0
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56117
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Martin L Roth <gaumless@tutanota.com>
diff --git a/src/mainboard/amd/majolica/Makefile.inc b/src/mainboard/amd/majolica/Makefile.inc
index 59bc3cf..dbd3a22 100644
--- a/src/mainboard/amd/majolica/Makefile.inc
+++ b/src/mainboard/amd/majolica/Makefile.inc
@@ -13,7 +13,7 @@
 
 ifeq ($(CONFIG_MAJOLICA_HAVE_MCHP_FW),y)
 $(call add_intermediate, add_mchp_fw)
-	$(CBFSTOOL) $(obj)/coreboot.pre write -r EC -f $(CONFIG_MAJOLICA_MCHP_FW_FILE) --fill-upward
+	$(CBFSTOOL) $< write -r EC -f $(CONFIG_MAJOLICA_MCHP_FW_FILE) --fill-upward
 else
 files_added:: warn_no_mchp
 endif # CONFIG_MAJOLICA_HAVE_MCHP_FW
diff --git a/src/mainboard/amd/mandolin/Makefile.inc b/src/mainboard/amd/mandolin/Makefile.inc
index d9effce..1a4740e 100644
--- a/src/mainboard/amd/mandolin/Makefile.inc
+++ b/src/mainboard/amd/mandolin/Makefile.inc
@@ -19,7 +19,7 @@
 ifeq ($(CONFIG_MANDOLIN_HAVE_MCHP_FW),y)
 
 $(call add_intermediate, add_mchp_fw)
-	$(CBFSTOOL) $(obj)/coreboot.pre write -r EC -f $(CONFIG_MANDOLIN_MCHP_FW_FILE) --fill-upward
+	$(CBFSTOOL) $< write -r EC -f $(CONFIG_MANDOLIN_MCHP_FW_FILE) --fill-upward
 
 else
 files_added:: warn_no_mchp
diff --git a/src/soc/amd/stoneyridge/Makefile.inc b/src/soc/amd/stoneyridge/Makefile.inc
index b2ac43f..b6bf4c2 100644
--- a/src/soc/amd/stoneyridge/Makefile.inc
+++ b/src/soc/amd/stoneyridge/Makefile.inc
@@ -171,7 +171,7 @@
 	printf "    DD         Adding AMD Firmware at ROM offset 0x%x\n" \
 		"$(STONEYRIDGE_FWM_ROM_POSITION)"
 	dd if=$(obj)/amdfw.rom \
-		of=$(obj)/coreboot.pre conv=notrunc bs=1 \
+		of=$< conv=notrunc bs=1 \
 		seek=$(STONEYRIDGE_FWM_ROM_POSITION) >/dev/null 2>&1
 
 else # ifeq ($(CONFIG_AMDFW_OUTSIDE_CBFS),y)
diff --git a/src/southbridge/amd/pi/hudson/Makefile.inc b/src/southbridge/amd/pi/hudson/Makefile.inc
index 9309455..633df04 100644
--- a/src/southbridge/amd/pi/hudson/Makefile.inc
+++ b/src/southbridge/amd/pi/hudson/Makefile.inc
@@ -157,7 +157,7 @@
 $(call add_intermediate, add_amdfw, $(obj)/amdfw.rom)
 	printf "    DD         Adding AMD Firmware\n"
 	dd if=$(obj)/amdfw.rom \
-		of=$(obj)/coreboot.pre conv=notrunc bs=1 seek=131072 >/dev/null 2>&1
+		of=$< conv=notrunc bs=1 seek=131072 >/dev/null 2>&1
 
 else # ifeq ($(CONFIG_AMDFW_OUTSIDE_CBFS),y)