ARM: OMAP: Fix omap-rtc

drivers/char/omap-rtc.c:125: error: static declaration of
'rtc_interrupt' follows non-static declaration
include/linux/rtc.h:107: error: previous declaration of
'rtc_interrupt' was here

Signed-off-by: Dirk Behme <dirk.behme_at_gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

drivers/char/omap-rtc.c

@@ -121,7 +121,7 @@ static const unsigned char days_in_mo[] =
  *	A very tiny interrupt handler. It runs with SA_INTERRUPT set.
  */
 
-static irqreturn_t rtc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+irqreturn_t rtc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 {
 	/*
 	 *	Either an alarm interrupt or update complete interrupt.