pinctrl: rockchip: fix rk3568 gpio4a iomux h issue

RK3288_GRF_GPIO6C_IOMUX address is 0x64, if not jugged type RK3288;
it will set rk3568 GRF_GPIO4A_IOMUX_H reg to 0x0 after resume.
then cause gpio4 a4/5/6/7 iomux abnormal.

Fixes: 8dca933 ("pinctrl: rockchip: save and restore gpio6_c6 pinmux in suspend/resume")
Change-Id: Icb7700ff63e3cb8ca46025e6efd260d91608f23f
Signed-off-by: Wang Panzhenzhuan <randy.wang@rock-chips.com>
Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>

Author: Wang Panzhenzhuan

drivers/pinctrl/pinctrl-rockchip.c

@@ -4516,12 +4516,15 @@ static int __maybe_unused rockchip_pinctrl_suspend(struct device *dev)
 static int __maybe_unused rockchip_pinctrl_resume(struct device *dev)
 {
 	struct rockchip_pinctrl *info = dev_get_drvdata(dev);
-	int ret = regmap_write(info->regmap_base, RK3288_GRF_GPIO6C_IOMUX,
-			       rk3288_grf_gpio6c_iomux |
-			       GPIO6C6_SEL_WRITE_ENABLE);
+	int ret;
 
-	if (ret)
-		return ret;
+	if (info->ctrl->type == RK3288) {
+		ret = regmap_write(info->regmap_base, RK3288_GRF_GPIO6C_IOMUX,
+				   rk3288_grf_gpio6c_iomux |
+				   GPIO6C6_SEL_WRITE_ENABLE);
+		if (ret)
+			return ret;
+	}
 
 	return pinctrl_force_default(info->pctl_dev);
 }