pinctrl/lantiq: only probe available pad controllers

The template falcon.dtsi lists all 6 pad controllers that
can be loaded. Only probe those that have status = "okay";
inside the dts file.

Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/pinctrl-falcon.c b/drivers/pinctrl/pinctrl-falcon.c
index 8ed20e8..6331c5c 100644
--- a/drivers/pinctrl/pinctrl-falcon.c
+++ b/drivers/pinctrl/pinctrl-falcon.c
@@ -398,6 +398,9 @@
 		u32 avail;
 		int pins;
 
+		if (!of_device_is_available(np))
+			continue;
+
 		if (!ppdev) {
 			dev_err(&pdev->dev, "failed to find pad pdev\n");
 			continue;