x86/split_lock: Enable the split lock feature on Sapphire Rapids and Alder Lake CPUs

Add Sapphire Rapids and Alder Lake processors to CPU list to enumerate
and enable the split lock feature.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/r/1595634320-79689-1-git-send-email-fenghua.yu@intel.com