pinctrl: abx500: Staticize some symbols

These symbols are used only in this file. Without this patch
we get the following warnings:
drivers/pinctrl/pinctrl-abx500.c:520:5: warning:
symbol 'abx500_gpio_request' was not declared. Should it be static?
drivers/pinctrl/pinctrl-abx500.c:527:6: warning:
symbol 'abx500_gpio_free' was not declared. Should it be static?
drivers/pinctrl/pinctrl-abx500.c:614:5: warning:
symbol 'abx500_gpio_request_enable' was not declared. Should it be static?
drivers/pinctrl/pinctrl-abx500.c:714:5: warning:
symbol 'abx500_pin_config_get' was not declared. Should it be static?
drivers/pinctrl/pinctrl-abx500.c:721:5: warning:
symbol 'abx500_pin_config_set' was not declared. Should it be static?

Signed-off-by: Sachin Kamat <[e-mail]>
Acked-by: Patrice Chotard <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

drivers/pinctrl/pinctrl-abx500.c

···
 #define abx500_gpio_dbg_show	NULL
 #endif
 
-int abx500_gpio_request(struct gpio_chip *chip, unsigned offset)
+static int abx500_gpio_request(struct gpio_chip *chip, unsigned offset)
 {
 	int gpio = chip->base + offset;
 
 	return pinctrl_request_gpio(gpio);
 }
 
-void abx500_gpio_free(struct gpio_chip *chip, unsigned offset)
+static void abx500_gpio_free(struct gpio_chip *chip, unsigned offset)
 {
 	int gpio = chip->base + offset;
 
···
 	dev_dbg(pct->dev, "disable group %s, %u pins\n", g->name, g->npins);
 }
 
-int abx500_gpio_request_enable(struct pinctrl_dev *pctldev,
+static int abx500_gpio_request_enable(struct pinctrl_dev *pctldev,
 			       struct pinctrl_gpio_range *range,
 			       unsigned offset)
 {
···
 	.pin_dbg_show = abx500_pin_dbg_show,
 };
 
-int abx500_pin_config_get(struct pinctrl_dev *pctldev,
+static int abx500_pin_config_get(struct pinctrl_dev *pctldev,
 			  unsigned pin,
 			  unsigned long *config)
 {
 	return -ENOSYS;
 }
 
-int abx500_pin_config_set(struct pinctrl_dev *pctldev,
+static int abx500_pin_config_set(struct pinctrl_dev *pctldev,
 			  unsigned pin,
 			  unsigned long config)
 {