drivers/rtc/rtc-mxc.c: remove defines already included in rtc.h

[akpm@linux-foundation.org: retain the code comments]
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Vladimir Zapolskiy <vzapolskiy@gmail.com>
Cc: Alessandro Zummo <alessandro.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/rtc.h b/include/linux/rtc.h
index 877ece4..b27ebea 100644
--- a/include/linux/rtc.h
+++ b/include/linux/rtc.h
@@ -92,10 +92,10 @@
 #define RTC_PLL_SET	_IOW('p', 0x12, struct rtc_pll_info)  /* Set PLL correction */
 
 /* interrupt flags */
-#define RTC_IRQF 0x80 /* any of the following is active */
-#define RTC_PF 0x40
-#define RTC_AF 0x20
-#define RTC_UF 0x10
+#define RTC_IRQF 0x80	/* Any of the following is active */
+#define RTC_PF 0x40	/* Periodic interrupt */
+#define RTC_AF 0x20	/* Alarm interrupt */
+#define RTC_UF 0x10	/* Update interrupt for 1Hz RTC */
 
 #ifdef __KERNEL__