Merge tag 'amd-thresholding-fixes-for-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras into x86/mce

- make the APIC LVT interrupt optional because a subset
  of AMD F15h models don't support it.

Signed-off-by: Ingo Molnar <mingo@kernel.org>