x86/mce: Grade uncorrected errors for SMCA-enabled systems

For upcoming processors with Scalable MCA feature, we need to check the
"succor" CPUID bit and the TCC bit in the MCx_STATUS register in order
to grade an MCE's severity.

Signed-off-by: Aravind Gopalakrishnan <[email protected]>
Signed-off-by: Yazen Ghannam <[email protected]>
[ Simplified code flow, shortened comments. ]
Signed-off-by: Borislav Petkov <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Aravind Gopalakrishnan <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: linux-edac <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

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