pinctrl: mvebu: Fix compiler warnings

match->data is const void * where as dev.platform_data is just void *.
Add a cast to remove the const, which is causing the compiler warning:

drivers/pinctrl/mvebu/pinctrl-kirkwood.c:461:26: warning: assignment
discards 'const' qualifier from pointer target type

Dove has the exact same warning, so gets the same cast.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/mvebu/pinctrl-kirkwood.c b/drivers/pinctrl/mvebu/pinctrl-kirkwood.c
index f12084e..7907e7c 100644
--- a/drivers/pinctrl/mvebu/pinctrl-kirkwood.c
+++ b/drivers/pinctrl/mvebu/pinctrl-kirkwood.c
@@ -458,7 +458,7 @@
 {
 	const struct of_device_id *match =
 		of_match_device(kirkwood_pinctrl_of_match, &pdev->dev);
-	pdev->dev.platform_data = match->data;
+	pdev->dev.platform_data = (void *)match->data;
 	return mvebu_pinctrl_probe(pdev);
 }