perf vendor events: Add mapping for KnightsMill PMU events

Reuse events from KnightsLanding for KnightsMill

Signed-off-by: Karol Wachowski <karol.wachowski@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <peter.zijlstra@intel.com>
Cc: Piotr Luc <piotr.luc@intel.com>
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: http://lkml.kernel.org/r/1487591440-25172-1-git-send-email-karol.wachowski@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>