mfd: Rename wm8350 static gpio_set_debounce()

The kernel already has a function with this name declared
in asm-generic/gpio.h. So if this header leaks into wm8350/gpio.c
we get

drivers/mfd/wm8350-gpio.c:40:12: error: conflicting types for 'gpio_set_debounce'
include/asm-generic/gpio.h:156:12: note: previous declaration of 'gpio_set_debounce' was here

Fix this by adding a wm8350_ prefix to the function.

Signed-off-by: Sascha Hauer <[e-mail]>
Acked-by: Mark Brown <[e-mail]>
Signed-off-by: Samuel Ortiz <[e-mail]>

drivers/mfd/wm8350-gpio.c

···
 	return ret;
 }
 
-static int gpio_set_debounce(struct wm8350 *wm8350, int gpio, int db)
+static int wm8350_gpio_set_debounce(struct wm8350 *wm8350, int gpio, int db)
 {
 	if (db == WM8350_GPIO_DEBOUNCE_ON)
 		return wm8350_set_bits(wm8350, WM8350_GPIO_DEBOUNCE,
···
 		goto err;
 	if (gpio_set_polarity(wm8350, gpio, pol))
 		goto err;
-	if (gpio_set_debounce(wm8350, gpio, debounce))
+	if (wm8350_gpio_set_debounce(wm8350, gpio, debounce))
 		goto err;
 	if (gpio_set_dir(wm8350, gpio, dir))
 		goto err;