x86/mce: Enable PPIN for Knights Landing/Mill

Intel Xeon Phi processors (KNL and KNM) support PPIN as well, so add their
CPUIDs to the whitelist of supported processors.

Signed-off-by: Piotr Luc <piotr.luc@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/20170408172004.8463-1-piotr.luc@intel.com
Link: http://lkml.kernel.org/r/20170413201056.10525-1-bp@alien8.de


Signed-off-by: Thomas Gleixner <tglx@linutronix.de>