RTC: sa1100: Clean out ost register

These registers are used in old ioctl of UIE and PIE, now they are
emulated by rtc generic code of hrtimer, so it can be removed.
Signed-off-by: NJett.Zhou <jtzhou@marvell.com>
Acked-by: NHaojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

drivers/rtc/rtc-sa1100.c

@@ -36,7 +36,6 @@
 
 #ifdef CONFIG_ARCH_PXA
 #include <mach/regs-rtc.h>
-#include <mach/regs-ost.h>
 #endif
 
 #define RTC_DEF_DIVIDER		(32768 - 1)
@@ -188,8 +187,6 @@ static void sa1100_rtc_release(struct device *dev)
 {
 	spin_lock_irq(&sa1100_rtc_lock);
 	RTSR = 0;
-	OIER &= ~OIER_E1;
-	OSSR = OSSR_M1;
 	spin_unlock_irq(&sa1100_rtc_lock);
 
 	free_irq(IRQ_RTCAlrm, dev);