pinctrl/amd: make functions amd_gpio_suspend and amd_gpio_resume static

The functions amd_gpio_suspend and amd_gpio_resume are local to the
source and do not need to be in global scope, so make them static.

Cleans up sparse warnings:
symbol 'amd_gpio_suspend' was not declared. Should it be static?
symbol 'amd_gpio_resume' was not declared. Should it be static?
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Reviewed-by: NDaniel Drake <drake@endlessm.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-amd.c

@@ -745,7 +745,7 @@ static bool amd_gpio_should_save(struct amd_gpio *gpio_dev, unsigned int pin)
 	return false;
 }
 
-int amd_gpio_suspend(struct device *dev)
+static int amd_gpio_suspend(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct amd_gpio *gpio_dev = platform_get_drvdata(pdev);
@@ -764,7 +764,7 @@ int amd_gpio_suspend(struct device *dev)
 	return 0;
 }
 
-int amd_gpio_resume(struct device *dev)
+static int amd_gpio_resume(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct amd_gpio *gpio_dev = platform_get_drvdata(pdev);