soc/amd/genoa: Add function to fetch common code dt configuration

Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Signed-off-by: Varshit Pandya <pandyavarshit@gmail.com>
Change-Id: I5d5d3ff27ab0953844f9bbef30b6487fb480e29b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76500
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martin.roth@amd.corp-partner.google.com>
diff --git a/src/soc/amd/genoa/Makefile.inc b/src/soc/amd/genoa/Makefile.inc
index 164c5e9..0e08ac6 100644
--- a/src/soc/amd/genoa/Makefile.inc
+++ b/src/soc/amd/genoa/Makefile.inc
@@ -2,6 +2,7 @@
 ifeq ($(CONFIG_SOC_AMD_GENOA),y)
 
 all-y		+= mmap_boot.c
+all-y		+= config.c
 
 bootblock-y	+= early_fch.c