rtc: omap: Remove unneeded semicolon

Fixes coccicheck warning:

drivers/rtc/rtc-omap.c:619:2-3: Unneeded semicolon

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Link: https://lore.kernel.org/r/1576466353-45384-1-git-send-email-zhengbin13@huawei.com


Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>