pinctrl/rockchip: add pinctrl device to gpio bank struct

Store a pointer from the pinctrl device for the gpio bank.
Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
Link: https://lore.kernel.org/r/20210816011948.1118959-4-jay.xu@rock-chips.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-rockchip.h

@@ -81,6 +81,7 @@ struct rockchip_drv {
 
 /**
  * struct rockchip_pin_bank
+ * @dev: the pinctrl device bind to the bank
  * @reg_base: register base of the gpio bank
  * @regmap_pull: optional separate register for additional pull settings
  * @clk: clock of the gpio bank
@@ -105,6 +106,7 @@ struct rockchip_drv {
  * @route_mask: bits describing the routing pins of per bank
  */
 struct rockchip_pin_bank {
+	struct device			*dev;
 	void __iomem			*reg_base;
 	struct regmap			*regmap_pull;
 	struct clk			*clk;