perf/x86/intel: Clean-up/reduce PEBS code

Get rid of some pointless duplication introduced by the Haswell code.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/n/tip-8q6y4davda9aawwv5yxe7klp@git.kernel.org


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