Use the dev_err_probe() helper for devm_gpiod_get_optional(), like we do
with gpiod_to_irq()

That eventually calls device_set_deferred_probe_reason() which can be
helpful for tracking down problems.

Now that all the error paths in uvc_gpio_parse have dev_err_probe, we
can remove the error message in uvc_probe.

Suggested-by: Doug Anderson <dianders@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Message-ID: <20250313-uvc-eprobedefer-v3-2-a1d312708eef@chromium.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>