util/amdfwtool: build amdfwtool only for all tools or AMD CPUs

When we're building non-AMD processors, don't bother building amdfwtool
unless we're specifically building all of the tools like for abuild.

Change-Id: I9021674a06d65a79e24020790d317ab947c505fe
Signed-off-by: Martin Roth <gaumless@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80714
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/common/block/psp/Kconfig

@@ -162,3 +162,9 @@ config AMD_FWM_POSITION
 	default 0xe20000 if AMD_FWM_POSITION_E20000
 	default 0xf20000 if AMD_FWM_POSITION_F20000
 	default 0xfa0000 if AMD_FWM_POSITION_FA0000
+
+config USE_AMDFWTOOL
+	bool
+	default y if SOC_AMD_COMMON_BLOCK_PSP
+	help
+	  Select this if AMDFWTOOL needs to be built

src/southbridge/amd/pi/hudson/Kconfig

@@ -24,6 +24,7 @@ config SOUTHBRIDGE_SPECIFIC_OPTIONS
 	select SOC_AMD_COMMON_BLOCK_BANKED_GPIOS
 	select SOC_AMD_COMMON_BLOCK_BANKED_GPIOS_NON_SOC_CODEBASE
 	select SOC_AMD_COMMON_BLOCK_PCI_MMCONF
+	select USE_AMDFWTOOL
 
 config EHCI_BAR
 	hex