sched: uninline rq_clock()

uninline rq_clock() to save 263 bytes of code:

   text    data     bss     dec     hex filename
   39561    3642      24   43227    a8db sched.o.before
   39298    3642      24   42964    a7d4 sched.o.after
Signed-off-by: NIngo Molnar <mingo@elte.hu>

kernel/sched.c

@@ -353,7 +353,7 @@ static unsigned long long __rq_clock(struct rq *rq)
 	return clock;
 }
 
-static inline unsigned long long rq_clock(struct rq *rq)
+static unsigned long long rq_clock(struct rq *rq)
 {
 	int this_cpu = smp_processor_id();