ARM: remove mc146818rtc.h from time.c

mc146818rtc.h is not needed in time.c, so remove it.
Signed-off-by: NRob Herring <rob.herring@calxeda.com>

arch/arm/kernel/time.c

@@ -25,8 +25,6 @@
 #include <linux/timer.h>
 #include <linux/irq.h>
 
-#include <linux/mc146818rtc.h>
-
 #include <asm/leds.h>
 #include <asm/thread_info.h>
 #include <asm/sched_clock.h>