cpu/intel/smm/gen1: Use correct MSR for model_6fx and model_1067x

According to the "Intel® 64 and IA-32 Architectures Software Developer’s Manual"
the SMRR MSR are at a different offset for model_6fx and model_1067x.

This still need SMRR enabled and lock bit set in MSR_FEATURE_CONTROL.

Change-Id: I8ee8292ab038e58deb8c24745ec1a9b5da8c31a9
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/27585
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
2 files changed