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/mips/kernel/cevt-txx9.c

@@ -27,7 +27,7 @@ struct txx9_clocksource {
 	struct txx9_tmr_reg __iomem *tmrptr;
 };
 
-static cycle_t txx9_cs_read(struct clocksource *cs)
+static u64 txx9_cs_read(struct clocksource *cs)
 {
 	struct txx9_clocksource *txx9_cs =
 		container_of(cs, struct txx9_clocksource, cs);