ktime: Cleanup ktime_set() usage

ktime_set(S,N) was required for the timespec storage type and is still
useful for situations where a Seconds and Nanoseconds part of a time value
needs to be converted. For anything where the Seconds argument is 0, this
is pointless and can be replaced with a simple assignment.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>

drivers/base/power/main.c

@@ -194,7 +194,7 @@ void device_pm_move_last(struct device *dev)
 
 static ktime_t initcall_debug_start(struct device *dev)
 {
-	ktime_t calltime = ktime_set(0, 0);
+	ktime_t calltime = 0;
 
 	if (pm_print_times_enabled) {
 		pr_info("calling  %s+ @ %i, parent: %s\n",