sched/smp: Use the SMP version of ENQUEUE_MIGRATED

Simplify the scheduler by making the CONFIG_SMP-only ENQUEUE_MIGRATED
flag unconditional.

Signed-off-by: Ingo Molnar <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Cc: Dietmar Eggemann <[email protected]>
Cc: Juri Lelli <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Sebastian Andrzej Siewior <[email protected]>
Cc: Shrikanth Hegde <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Valentin Schneider <[email protected]>
Cc: Vincent Guittot <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: Ingo Molnar

kernel/sched/sched.h

@@ -2319,11 +2319,7 @@ extern const u32		sched_prio_to_wmult[40];
 
 #define ENQUEUE_HEAD		0x10
 #define ENQUEUE_REPLENISH	0x20
-#ifdef CONFIG_SMP
 #define ENQUEUE_MIGRATED	0x40
-#else
-#define ENQUEUE_MIGRATED	0x00
-#endif
 #define ENQUEUE_INITIAL		0x80
 #define ENQUEUE_MIGRATING	0x100
 #define ENQUEUE_DELAYED		0x200