pinctrl: use ERR_CAST instead of ERR_PTR(PTR_ERR(...))

This doesn't change semantics, just looks nicer.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/include/linux/pinctrl/consumer.h b/include/linux/pinctrl/consumer.h
index e9b7f43..d281645 100644
--- a/include/linux/pinctrl/consumer.h
+++ b/include/linux/pinctrl/consumer.h
@@ -140,7 +140,7 @@
 	s = pinctrl_lookup_state(p, name);
 	if (IS_ERR(s)) {
 		devm_pinctrl_put(p);
-		return ERR_PTR(PTR_ERR(s));
+		return ERR_CAST(s);
 	}
 
 	ret = pinctrl_select_state(p, s);