perf/x86/intel: Clean up intel_commit_scheduling() placement

perf/x86/intel: Clean up intel_commit_scheduling() placement

Move the code of intel_commit_scheduling() to the right place, which is
in between start() and stop().

No change in functionality.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Ingo Molnar <mingo@kernel.org>