clocksource/drivers/vt8500: Remove unneeded header

Remove the <asm/time.h> header inclusion which is pointless.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
diff --git a/drivers/clocksource/vt8500_timer.c b/drivers/clocksource/vt8500_timer.c
index a92e94b..de49805 100644
--- a/drivers/clocksource/vt8500_timer.c
+++ b/drivers/clocksource/vt8500_timer.c
@@ -30,7 +30,6 @@
 #include <linux/clocksource.h>
 #include <linux/clockchips.h>
 #include <linux/delay.h>
-#include <asm/mach/time.h>
 
 #include <linux/of.h>
 #include <linux/of_address.h>