clocksource: Use a plain u64 instead of cycle_t

There is no point in having an extra type for extra confusion. u64 is
unambiguous.

Conversion was done with the following coccinelle script:

@rem@
@@
-typedef u64 cycle_t;

@fix@
typedef cycle_t;
@@
-cycle_t
+u64

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: John Stultz <john.stultz@linaro.org>
diff --git a/drivers/clocksource/jcore-pit.c b/drivers/clocksource/jcore-pit.c
index 54e1665..e90a6cf 100644
--- a/drivers/clocksource/jcore-pit.c
+++ b/drivers/clocksource/jcore-pit.c
@@ -57,7 +57,7 @@ static notrace u64 jcore_sched_clock_read(void)
 	return seclo * NSEC_PER_SEC + nsec;
 }
 
-static cycle_t jcore_clocksource_read(struct clocksource *cs)
+static u64 jcore_clocksource_read(struct clocksource *cs)
 {
 	return jcore_sched_clock_read();
 }