pinctrl: u300: Staticize non-exported symbols

Staticize u300_pin_config_get() and u300_pin_config_set() functions.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-u300.c

@@ -1052,8 +1052,7 @@ static struct pinctrl_gpio_range *u300_match_gpio_range(unsigned pin)
 	return NULL;
 }
 
-int u300_pin_config_get(struct pinctrl_dev *pctldev,
-			unsigned pin,
+static int u300_pin_config_get(struct pinctrl_dev *pctldev, unsigned pin,
 			       unsigned long *config)
 {
 	struct pinctrl_gpio_range *range = u300_match_gpio_range(pin);
@@ -1067,8 +1066,7 @@ int u300_pin_config_get(struct pinctrl_dev *pctldev,
 				    config);
 }
 
-int u300_pin_config_set(struct pinctrl_dev *pctldev,
-			unsigned pin,
+static int u300_pin_config_set(struct pinctrl_dev *pctldev, unsigned pin,
 			       unsigned long config)
 {
 	struct pinctrl_gpio_range *range = u300_match_gpio_range(pin);