rtc: rv3032: fix error handling in rv3032_clkout_set_rate()

Do not call rv3032_exit_eerd() if the enter function fails but don't
forget to call the exit when the enter succeeds.

Fixes: 2eeaa532 ("rtc: rv3032: Add a driver for Microcrystal RV-3032")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20211012101028.GT2083@kadam