clocksource/drivers/prima2: Remove useless header <asm/mach/time.h>

The driver includes the <asm/mach/time.h> header but it is pointless.

Remove it.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>

drivers/clocksource/timer-prima2.c

@@ -19,7 +19,6 @@
 #include <linux/of_irq.h>
 #include <linux/of_address.h>
 #include <linux/sched_clock.h>
-#include <asm/mach/time.h>
 
 #define PRIMA2_CLOCK_FREQ 1000000