pinctrl: ocelot: make function ocelot_pinctrl_probe static

The function ocelot_pinctrl_probe is local to the source and does not
need to be in global scope, so make it static.

Cleans up sparse warning:
drivers/pinctrl/pinctrl-ocelot.c:465:5: warning: symbol
'ocelot_pinctrl_probe' was not declared. Should it be static?
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-ocelot.c

@@ -462,7 +462,7 @@ static const struct of_device_id ocelot_pinctrl_of_match[] = {
 	{},
 };
 
-int ocelot_pinctrl_probe(struct platform_device *pdev)
+static int ocelot_pinctrl_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct ocelot_pinctrl *info;