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>