The pinctrl driver had been replaced with the upstream one in b756ea2a90
("ramips: replace pinctrl property names"), but the initial A1004ns support
patch did not reflect the changes. This commit updates its pinctrl property
names.
Fixes: 9169482f64 ("ramips: add support for ipTIME A1004ns")
Signed-off-by: Sungbo Eo <mans0n@gorani.run>