perf/x86/intel: Add Goldmont Plus CPU PMU support

Add perf core PMU support for Intel Goldmont Plus CPU cores:

 - The init code is based on Goldmont.
 - There is a new cache event list, based on the Goldmont cache event
   list.
 - All four general-purpose performance counters support PEBS.
 - The first general-purpose performance counter is for reduced skid
   PEBS mechanism. Using :ppp to indicate the event which want to do
   reduced skid PEBS.
 - Goldmont Plus has 4-wide pipeline for Topdown

Signed-off-by: Kan Liang <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Vince Weaver <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

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