serial: 8250_lpc18xx: disable clks on error in probe()

Goto the clean up path to clean up a couple clocks before returning
on this error path.

Fixes: 0087b9e6 ("serial: 8250_lpc18xx: Switch to use uart_read_port_properties()")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/92646c10-e0b5-4117-a9ac-ce9987d33ce3@moroto.mountain


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>