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>

arch/sparc/kernel/time_32.c

@@ -148,7 +148,7 @@ static unsigned int sbus_cycles_offset(void)
 	return offset;
 }
 
-static cycle_t timer_cs_read(struct clocksource *cs)
+static u64 timer_cs_read(struct clocksource *cs)
 {
 	unsigned int seq, offset;
 	u64 cycles;

arch/sparc/kernel/time_64.c

@@ -770,7 +770,7 @@ void udelay(unsigned long usecs)
 }
 EXPORT_SYMBOL(udelay);
 
-static cycle_t clocksource_tick_read(struct clocksource *cs)
+static u64 clocksource_tick_read(struct clocksource *cs)
 {
 	return tick_ops->get_tick();
 }