MAINBOARD_USES_FSP2_0 selects PLATFORM_USES_FSP2_0 and POSTCAR_STAGE which are used by all Xeon-SP platforms. After the removal of MAINBOARD_USES_FSP2_0, PLATFORM_USES_FSP2_0 is implicitly selected by SoC Kconfigs in PLATFORM_USES_FSP2_X, POSTCAR_STAGE is selected by XEON_SP_COMMON_BASE. TEST=Build and boot on intel/archercity CRB Change-Id: I45332d49dd21f9749fce458877777a4b783a1b11 Signed-off-by: Shuo Liu <shuo.liu@intel.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/81783 Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>