printk: rename printk_sched to printk_deferred

After learning we'll need some sort of deferred printk functionality in
the timekeeping core, Peter suggested we rename the printk_sched function
so it can be reused by needed subsystems.

This only changes the function name. No logic changes.

Signed-off-by: John Stultz <[email protected]>
Reviewed-by: Steven Rostedt <[email protected]>
Cc: Jan Kara <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Jiri Bohac <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Ingo Molnar <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

kernel/printk/printk.c

@@ -2585,7 +2585,7 @@ void wake_up_klogd(void)
 	preempt_enable();
 }
 
-int printk_sched(const char *fmt, ...)
+int printk_deferred(const char *fmt, ...)
 {
 	va_list args;
 	int r;