perf_counter: fix !PERF_COUNTERS build failure

Update the !CONFIG_PERF_COUNTERS prototype too, for
perf_counter_task_sched_out().

[ Impact: build fix ]
Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <18966.10666.517218.332164@cargo.ozlabs.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

include/linux/perf_counter.h

@@ -625,7 +625,8 @@ extern void perf_counter_init(void);
 static inline void
 perf_counter_task_sched_in(struct task_struct *task, int cpu)		{ }
 static inline void
-perf_counter_task_sched_out(struct task_struct *task, int cpu)		{ }
+perf_counter_task_sched_out(struct task_struct *task,
+			    struct task_struct *next, int cpu)		{ }
 static inline void
 perf_counter_task_tick(struct task_struct *task, int cpu)		{ }
 static inline void perf_counter_init_task(struct task_struct *child)	{ }