dm: core: device: set pinctrl state for pinctrl device

We may have pinmux settings for pinctrl device, like the following
example:
"
&iomuxc {
	pinctrl-names = "default";
	pinctrl-0 = <&pinctrl_hog_1>;
	imx6ul-evk {
		pinctrl_hog_1: hoggrp-1 {
			fsl,pins = <
				MX6UL_PAD_UART1_RTS_B__GPIO1_IO19	0x17059 /* SD1 CD */
				MX6UL_PAD_GPIO1_IO05__USDHC1_VSELECT	0x17059 /* SD1 VSELECT */
				MX6UL_PAD_GPIO1_IO09__GPIO1_IO09        0x17059 /* SD1 RESET */
				MX6UL_PAD_SNVS_TAMPER0__GPIO5_IO00	0x80000000
			>;
		};
	[......]
};
"

We should not only select pinctrl state for non pinctrl devices, we
need also to handle pin mux settings such as pinctrl_log for pinctrl
devices.

So at the end of probing process of pinctrl device, select the default
state of pinctrl device.

Signed-off-by: Peng Fan <[email protected]>
Cc: Simon Glass <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Reviewed-by: Masahiro Yamada <[email protected]>

drivers/core/device.c

@@ -332,6 +332,9 @@ int device_probe(struct udevice *dev)
 	if (ret)
 		goto fail_uclass;
 
+	if (dev->parent && device_get_uclass_id(dev) == UCLASS_PINCTRL)
+		pinctrl_select_state(dev, "default");
+
 	return 0;
 fail_uclass:
 	if (device_remove(dev)) {