ktime: Get rid of the union

ktime is a union because the initial implementation stored the time in
scalar nanoseconds on 64 bit machine and in a endianess optimized timespec
variant for 32bit machines. The Y2038 cleanup removed the timespec variant
and switched everything to scalar nanoseconds. The union remained, but
become completely pointless.

Get rid of the union and just keep ktime_t as simple typedef of type s64.

The conversion was done with coccinelle and some manual mopping up.

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

drivers/usb/host/ehci-timer.c

@@ -425,7 +425,7 @@ static enum hrtimer_restart ehci_hrtimer_func(struct hrtimer *t)
 	 */
 	now = ktime_get();
 	for_each_set_bit(e, &events, EHCI_HRTIMER_NUM_EVENTS) {
-		if (now.tv64 >= ehci->hr_timeouts[e].tv64)
+		if (now >= ehci->hr_timeouts[e])
 			event_handlers[e](ehci);
 		else
 			ehci_enable_event(ehci, e, false);

drivers/usb/host/fotg210-hcd.c

@@ -1381,7 +1381,7 @@ static enum hrtimer_restart fotg210_hrtimer_func(struct hrtimer *t)
 	 */
 	now = ktime_get();
 	for_each_set_bit(e, &events, FOTG210_HRTIMER_NUM_EVENTS) {
-		if (now.tv64 >= fotg210->hr_timeouts[e].tv64)
+		if (now >= fotg210->hr_timeouts[e])
 			event_handlers[e](fotg210);
 		else
 			fotg210_enable_event(fotg210, e, false);