soc/intel/meteorlake: Select `X86_CLFLUSH_CAR` config

This patch selects `X86_CLFLUSH_CAR` config for running
`clflush` to invalidate the cache region.

TEST=Able to build and boot google/rex.

Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: I6b2dce39f82e28cd99ad8621c78bae494c4f16ba
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73333
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>

src/soc/intel/meteorlake/Kconfig

@@ -96,6 +96,7 @@ config CPU_SPECIFIC_OPTIONS
 	select TSC_MONOTONIC_TIMER
 	select UDELAY_TSC
 	select UDK_202111_BINDING
+	select X86_CLFLUSH_CAR
 	select X86_INIT_NEED_1_SIPI
 
 config SOC_INTEL_METEORLAKE_TCSS_USB4_SUPPORT