rx6110sa: Make sure that VLF bit will be cleared

Ensure that the VLF bit will be cleared after a power loss event even if
the stopwatch has expired before the code to clear the bit is reached.

Change-Id: Ib2cfdabf4cd4df834395d6a102c6ae70568e71db
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/20893
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Mario Scheithauer <mario.scheithauer@siemens.com>

src/drivers/i2c/rx6110sa/rx6110sa.c

@@ -163,6 +163,7 @@ static void rx6110sa_init(struct device *dev)
 	 * VLF-bit can be cleared.
 	 */
 	while (!stopwatch_expired(&sw))
+		;
 	flags &= ~VLF_BIT;
 	rx6110sa_write(dev, FLAG_REGISTER, flags);