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>

drivers/clocksource/sh_tmu.c

@@ -255,7 +255,7 @@ static struct sh_tmu_channel *cs_to_sh_tmu(struct clocksource *cs)
 	return container_of(cs, struct sh_tmu_channel, cs);
 }
 
-static cycle_t sh_tmu_clocksource_read(struct clocksource *cs)
+static u64 sh_tmu_clocksource_read(struct clocksource *cs)
 {
 	struct sh_tmu_channel *ch = cs_to_sh_tmu(cs);