pinctrl: mediatek: pinctrl-mtk-common: Simplify with dev_err_probe()

Use the dev_err_probe() helper to simplify error handling during probe.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20220308100956.2750295-12-wenst@chromium.org


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>