perf_counter: Turn off by default

Perfcounters were enabled by default to help testing - but now that we
are submitting it upstream, make it default-disabled.

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

init/Kconfig

@@ -941,7 +941,6 @@ menu "Performance Counters"
 config PERF_COUNTERS
 	bool "Kernel Performance Counters"
 	depends on HAVE_PERF_COUNTERS
-	default y
 	select ANON_INODES
 	help
 	  Enable kernel support for performance counter hardware.