gpio: pca953x: log an error when failing to get the reset GPIO

When the dirver fails getting this GPIO, it fails silently. Log an error
message to make debugging a lot easier by just reading dmesg.

Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Fixes: 054ccdef ("gpio: pca953x: Add optional reset gpio control")
Link: https://lore.kernel.org/r/20241219-pca953x-log-no-reset-gpio-v1-1-9aa7bcc45ead@bootlin.com


Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>