regulator: core: do not continue if selector match

Do not continue if selector has already been located.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/1605290164-11556-1-git-send-email-claudiu.beznea@microchip.com


Signed-off-by: Mark Brown <broonie@kernel.org>