soc/intel/ptl: Update ME specification version to 21
This patch updates Kconfig that selects ME specification version for
Pantherlake SoC from version 18 to version 21.
BUG=b:
362647201
TEST=Able to build fatcat with SOC_INTEL_COMMON_ME_SPEC_21 selected.
Change-Id: Ibfebd7c093240aa7f1d6337f3e4dd6e5d34bed1d
Signed-off-by: Pranava Y N <pranavayn@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/85187
Reviewed-by: Subrata Banik <subratabanik@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>