Revert "sched/core: fix have_sched_energy_data build warning"

This reverts commit a899b90.

Reverting for now due to suspend warning issues.

Change-Id: I9387297b52552a73d5a253b9e8e4467b366479a5

Author: Joel Fernandes

kernel/sched/core.c

@@ -91,9 +91,7 @@
 #include <trace/events/sched.h>
 #include "walt.h"
 
-#ifdef CONFIG_SMP
 static bool have_sched_energy_data(void);
-#endif
 
 DEFINE_MUTEX(sched_domains_mutex);
 DEFINE_PER_CPU_SHARED_ALIGNED(struct rq, runqueues);
@@ -197,11 +195,10 @@ static int sched_feat_set(char *cmp)
 				sysctl_sched_features &= ~(1UL << i);
 				sched_feat_disable(i);
 			} else {
-#ifdef CONFIG_SMP
 				if (i == __SCHED_FEAT_ENERGY_AWARE)
 					WARN(!have_sched_energy_data(),
 					     "Missing sched energy data\n");
-#endif
+
 				sysctl_sched_features |= (1UL << i);
 				sched_feat_enable(i);
 			}