leds: ncp5623: Use common error handling code in ncp5623_probe()

Add a label so that a bit of exception handling can be better reused
at the end of this function implementation.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Link: https://lore.kernel.org/r/5faec5de-fc36-4b38-abcb-c61954a824cd@web.de


Signed-off-by: Lee Jones <lee@kernel.org>