pinctrl: bcm: nsp: Use library functions

These request/free functions are just reimplementations of the
standard helpers in gpiolib. Delete them and replace with the
helpers.
Acked-by: NScott Branden <scott.branden@broadcom.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/bcm/pinctrl-nsp-gpio.c

@@ -275,23 +275,6 @@ static struct irq_chip nsp_gpio_irq_chip = {
 	.irq_set_type = nsp_gpio_irq_set_type,
 };
 
-/*
- * Request the nsp IOMUX pinmux controller to mux individual pins to GPIO
- */
-static int nsp_gpio_request(struct gpio_chip *gc, unsigned offset)
-{
-	unsigned gpio = gc->base + offset;
-
-	return pinctrl_gpio_request(gpio);
-}
-
-static void nsp_gpio_free(struct gpio_chip *gc, unsigned offset)
-{
-	unsigned gpio = gc->base + offset;
-
-	pinctrl_gpio_free(gpio);
-}
-
 static int nsp_gpio_direction_input(struct gpio_chip *gc, unsigned gpio)
 {
 	struct nsp_gpio *chip = gpiochip_get_data(gc);
@@ -670,8 +653,8 @@ static int nsp_gpio_probe(struct platform_device *pdev)
 	gc->label = dev_name(dev);
 	gc->parent = dev;
 	gc->of_node = dev->of_node;
-	gc->request = nsp_gpio_request;
-	gc->free = nsp_gpio_free;
+	gc->request = gpiochip_generic_request;
+	gc->free = gpiochip_generic_free;
 	gc->direction_input = nsp_gpio_direction_input;
 	gc->direction_output = nsp_gpio_direction_output;
 	gc->set = nsp_gpio_set;