[RTC] remove unused asm/rtc.h includes from ARM RTC drivers

On ARM, asm/rtc.h only contains definitions for the predecessor to
the RTC class support.  RTC class drivers should not be including
this include.

Build tested on at91sam9rl and s3c2410 configurations.
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

drivers/rtc/rtc-at91rm9200.c

@@ -29,8 +29,6 @@
 #include <linux/completion.h>
 
 #include <asm/uaccess.h>
-#include <asm/rtc.h>
-
 #include <asm/arch/at91_rtc.h>
 
 

drivers/rtc/rtc-s3c.c

@@ -26,8 +26,6 @@
 #include <asm/uaccess.h>
 #include <asm/io.h>
 #include <asm/irq.h>
-#include <asm/rtc.h>
-
 #include <asm/plat-s3c/regs-rtc.h>
 
 /* I have yet to find an S3C implementation with more than one