pinctrl/: at91: fix warnings

/opt/work/linux-2.6/drivers/pinctrl/pinctrl-at91.c: In function 'at91_pinctrl_probe_dt':
/opt/work/linux-2.6/drivers/pinctrl/pinctrl-at91.c:952:12: warning: assignment discards qualifiers from pointer target type
/opt/work/linux-2.6/drivers/pinctrl/pinctrl-at91.c: In function 'at91_gpio_probe':
/opt/work/linux-2.6/drivers/pinctrl/pinctrl-at91.c:1517:17: warning: assignment discards qualifiers from pointer target type

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
index 676b199..5bb7d51 100644
--- a/drivers/pinctrl/pinctrl-at91.c
+++ b/drivers/pinctrl/pinctrl-at91.c
@@ -838,7 +838,7 @@
 		return -ENODEV;
 
 	info->dev = &pdev->dev;
-	info->ops =
+	info->ops = (struct at91_pinctrl_mux_ops*)
 		of_match_device(at91_pinctrl_of_match, &pdev->dev)->data;
 	at91_pinctrl_child_count(info, np);
 
@@ -1403,7 +1403,7 @@
 		goto err;
 	}
 
-	at91_chip->ops =
+	at91_chip->ops = (struct at91_pinctrl_mux_ops*)
 		of_match_device(at91_gpio_of_match, &pdev->dev)->data;
 	at91_chip->pioc_virq = irq;
 	at91_chip->pioc_idx = alias_idx;