x86/cpu: Add Xeon Emerald Rapids to list of CPUs that support PPIN

This should be the last addition to this table. Future CPUs will
enumerate PPIN support using CPUID.

Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20230404212124.428118-1-tony.luck@intel.com