soc/intel/xeon_sp/skx: Lock all PCU registers
Lock all PCU registers on all sockets. The same code can be found
on CPX, which is basically the same CPU. Once the differences between
CPX and SKX are minimal, the platforms can be merged into one codebase.
Change-Id: I73eaa0905e8a418fc9dfe515c42cd257c041cf61
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84843
Reviewed-by: Shuo Liu <shuo.liu@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>