pinctrl: nsp-gpio: fix up parent attribute

The .dev field has been renamed .parent in the GPIO tree.
Fix it up.

Cc: Yendapally Reddy Dhananjaya Reddy <yrdreddy@broadcom.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/bcm/pinctrl-nsp-gpio.c b/drivers/pinctrl/bcm/pinctrl-nsp-gpio.c
index 06b7aaf..bb7891e 100644
--- a/drivers/pinctrl/bcm/pinctrl-nsp-gpio.c
+++ b/drivers/pinctrl/bcm/pinctrl-nsp-gpio.c
@@ -668,7 +668,7 @@
 	gc->can_sleep = false;
 	gc->ngpio = val;
 	gc->label = dev_name(dev);
-	gc->dev = dev;
+	gc->parent = dev;
 	gc->of_node = dev->of_node;
 	gc->request = nsp_gpio_request;
 	gc->free = nsp_gpio_free;