soc/intel/meteorlake: Have non prefetchable MMIO for IGD BAR0

Enable SOC_INTEL_GFX_NON_PREFETCHABLE_MMIO for MTL to fix guc driver
failure.

BUG=b:241746156
TEST=boot to OS and check guc driver loading successful
Signed-off-by: Wonkyu Kim <wonkyu.kim@intel.com>
Change-Id: Ifc20935bccdda55db3e57eecd37a4260b3f1a2d1
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66613
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Tarun Tuli <taruntuli@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/meteorlake/Kconfig

@@ -82,6 +82,7 @@ config CPU_SPECIFIC_OPTIONS
 	select SOC_INTEL_COMMON_RESET
 	select SOC_INTEL_COMMON_BLOCK_IOC
 	select SOC_INTEL_CSE_SET_EOP
+	select SOC_INTEL_GFX_NON_PREFETCHABLE_MMIO
 	select SOC_INTEL_MEM_MAPPED_PM_CONFIGURATION
 	select SSE2
 	select SUPPORT_CPU_UCODE_IN_CBFS