soc/intel: Disable config option for SCS by default

The eMMC/SD interface is not present in all Intel platforms so this
change removes the default enable for the storage controller and
instead enables it in the specific SoCs that do provide it.

Currently this includes all platforms except Tigerlake.

Change-Id: I8b6cab41dbd5080f4a7801f01279f47e80ceaefd
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40371
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/soc/intel/skylake/Kconfig

@@ -62,6 +62,7 @@ config CPU_SPECIFIC_OPTIONS
 	select SOC_INTEL_COMMON_BLOCK_GSPI
 	select SOC_INTEL_COMMON_BLOCK_HDA
 	select SOC_INTEL_COMMON_BLOCK_SA
+	select SOC_INTEL_COMMON_BLOCK_SCS
 	select SOC_INTEL_COMMON_BLOCK_SGX
 	select SOC_INTEL_COMMON_BLOCK_SGX_LOCK_MEMORY
 	select SOC_INTEL_COMMON_BLOCK_SMM