gpiolib: Remove duplicated function gpio_do_set_config()

gpio_set_config() simply call gpio_do_set_config(),
so remove the duplicated function.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20200116142927.58908-1-yuehaibing@huawei.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpiolib.c

@@ -3058,7 +3058,7 @@ EXPORT_SYMBOL_GPL(gpiochip_free_own_desc);
  * rely on gpio_request() having been called beforehand.
  */
 
-static int gpio_do_set_config(struct gpio_chip *gc, unsigned int offset,
+static int gpio_set_config(struct gpio_chip *gc, unsigned int offset,
 			   enum pin_config_param mode)
 {
 	if (!gc->set_config)
@@ -3067,25 +3067,6 @@ static int gpio_do_set_config(struct gpio_chip *gc, unsigned int offset,
 	return gc->set_config(gc, offset, mode);
 }
 
-static int gpio_set_config(struct gpio_chip *gc, unsigned int offset,
-			   enum pin_config_param mode)
-{
-	unsigned arg;
-
-	switch (mode) {
-	case PIN_CONFIG_BIAS_DISABLE:
-	case PIN_CONFIG_BIAS_PULL_DOWN:
-	case PIN_CONFIG_BIAS_PULL_UP:
-		arg = 1;
-		break;
-
-	default:
-		arg = 0;
-	}
-
-	return gpio_do_set_config(gc, offset, mode);
-}
-
 static int gpio_set_bias(struct gpio_chip *chip, struct gpio_desc *desc)
 {
 	int bias = 0;
@@ -3319,7 +3300,7 @@ int gpiod_set_debounce(struct gpio_desc *desc, unsigned debounce)
 	chip = desc->gdev->chip;
 
 	config = pinconf_to_config_packed(PIN_CONFIG_INPUT_DEBOUNCE, debounce);
-	return gpio_do_set_config(chip, gpio_chip_hwgpio(desc), config);
+	return gpio_set_config(chip, gpio_chip_hwgpio(desc), config);
 }
 EXPORT_SYMBOL_GPL(gpiod_set_debounce);
 
@@ -3353,7 +3334,7 @@ int gpiod_set_transitory(struct gpio_desc *desc, bool transitory)
 	packed = pinconf_to_config_packed(PIN_CONFIG_PERSIST_STATE,
 					  !transitory);
 	gpio = gpio_chip_hwgpio(desc);
-	rc = gpio_do_set_config(chip, gpio, packed);
+	rc = gpio_set_config(chip, gpio, packed);
 	if (rc == -ENOTSUPP) {
 		dev_dbg(&desc->gdev->dev, "Persistence not supported for GPIO %d\n",
 				gpio);