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>

kernel/time/jiffies.c

@@ -59,9 +59,9 @@
 #define JIFFIES_SHIFT	8
 #endif
 
-static cycle_t jiffies_read(struct clocksource *cs)
+static u64 jiffies_read(struct clocksource *cs)
 {
-	return (cycle_t) jiffies;
+	return (u64) jiffies;
 }
 
 static struct clocksource clocksource_jiffies = {