perf/x86/intel/uncore: Clean up client IMC uncore

perf/x86/intel/uncore: Clean up client IMC uncore

The counters in client IMC uncore are free running counters, not fixed
counters. It should be corrected. The new infrastructure for free
running counter should be applied.

Introducing a new type SNB_PCI_UNCORE_IMC_DATA for client IMC free
running counters.

Keeping the customized event_init() function to be compatible with old
event encoding.

Clean up other customized event_*() functions.

Signed-off-by: Kan Liang <kan.liang@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: acme@kernel.org
Cc: eranian@google.com
Link: http://lkml.kernel.org/r/1525371913-10597-8-git-send-email-kan.liang@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>