sched/smp: Use the SMP version of double_rq_clock_clear_update()

Simplify the scheduler by making CONFIG_SMP=y code in
double_rq_clock_clear_update() unconditional.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Shrikanth Hegde <sshegde@linux.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Valentin Schneider <vschneid@redhat.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20250528080924.2273858-44-mingo@kernel.org

Author: ingomolnar

kernel/sched/sched.h

@@ -2840,10 +2840,7 @@ unsigned long arch_scale_freq_capacity(int cpu)
 static inline void double_rq_clock_clear_update(struct rq *rq1, struct rq *rq2)
 {
 	rq1->clock_update_flags &= (RQCF_REQ_SKIP|RQCF_ACT_SKIP);
-	/* rq1 == rq2 for !CONFIG_SMP, so just clear RQCF_UPDATED once. */
-#ifdef CONFIG_SMP
 	rq2->clock_update_flags &= (RQCF_REQ_SKIP|RQCF_ACT_SKIP);
-#endif
 }
 
 #define DEFINE_LOCK_GUARD_2(name, type, _lock, _unlock, ...)				\