pinctrl: do not set_state for device without valid ofnode

Not all the udevice have a available DT node, eg. rksdmmc@ff500000.blk
which add by mmc_bind(), these device do not have/need set pinctrl
state.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

drivers/pinctrl/pinctrl-uclass.c

@@ -198,6 +198,12 @@ static int pinctrl_select_state_simple(struct udevice *dev)
 
 int pinctrl_select_state(struct udevice *dev, const char *statename)
 {
+	/*
+	 * Some device which is logical like mmc.blk, do not have
+	 * a valid ofnode.
+	 */
+	if (!ofnode_valid(dev->node))
+		return 0;
 	/*
 	 * Try full-implemented pinctrl first.
 	 * If it fails or is not implemented, try simple one.