sched: Clean up and standardize #if/#else/#endif markers in sched/autogroup.[ch]

- Use the standard #ifdef marker format for larger blocks,
   where appropriate:

        #if CONFIG_FOO
        ...
        #else /* !CONFIG_FOO: */
        ...
        #endif /* !CONFIG_FOO */

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/20250528080924.2273858-2-mingo@kernel.org

kernel/sched/autogroup.c

@@ -28,9 +28,9 @@ static void __init sched_autogroup_sysctl_init(void)
 {
 	register_sysctl_init("kernel", sched_autogroup_sysctls);
 }
-#else
+#else /* !CONFIG_SYSCTL: */
 #define sched_autogroup_sysctl_init() do { } while (0)
-#endif
+#endif /* !CONFIG_SYSCTL */
 
 void __init autogroup_init(struct task_struct *init_task)
 {
@@ -111,7 +111,7 @@ static inline struct autogroup *autogroup_create(void)
 	free_rt_sched_group(tg);
 	tg->rt_se = root_task_group.rt_se;
 	tg->rt_rq = root_task_group.rt_rq;
-#endif
+#endif /* CONFIG_RT_GROUP_SCHED */
 	tg->autogroup = ag;
 
 	sched_online_group(tg, &root_task_group);

kernel/sched/autogroup.h

@@ -43,7 +43,7 @@ autogroup_task_group(struct task_struct *p, struct task_group *tg)
 
 extern int autogroup_path(struct task_group *tg, char *buf, int buflen);
 
-#else /* !CONFIG_SCHED_AUTOGROUP */
+#else /* !CONFIG_SCHED_AUTOGROUP: */
 
 static inline void autogroup_init(struct task_struct *init_task) {  }
 static inline void autogroup_free(struct task_group *tg) { }
@@ -63,6 +63,6 @@ static inline int autogroup_path(struct task_group *tg, char *buf, int buflen)
 	return 0;
 }
 
-#endif /* CONFIG_SCHED_AUTOGROUP */
+#endif /* !CONFIG_SCHED_AUTOGROUP */
 
 #endif /* _KERNEL_SCHED_AUTOGROUP_H */