pinctrl: rockchip: fix pinmux reset in rockchip_pmx_set

rockchip_pmx_set reset all pinmuxs in group to 0 in the case of error,
add missing bank data retrieval in that code to avoid setting mux on
unexpected pins.

Fixes: 1479718 ("pinctrl: rockchip: add return value to rockchip_set_mux")
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Huang-Huang Bao <i@eh5.me>
Link: https://lore.kernel.org/r/20240606125755.53778-5-i@eh5.me
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-rockchip.c

@@ -2751,8 +2751,10 @@ static int rockchip_pmx_set(struct pinctrl_dev *pctldev, unsigned selector,
 
  if (ret) {
  /* revert the already done pin settings */
- for (cnt--; cnt >= 0; cnt--)
+ for (cnt--; cnt >= 0; cnt--) {
+ bank = pin_to_bank(info, pins[cnt]);
  rockchip_set_mux(bank, pins[cnt] - bank->pin_base, 0);
+ }
 
  return ret;
  }