pinctrl: starfive: Use scope based of_node_put() cleanups

Use scope based of_node_put() cleanup to simplify code.

Acked-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/20240504-pinctrl-cleanup-v2-4-26c5f2dc1181@nxp.com


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