pinctrl: sirf: fix a typo in sirfsoc_gpio_probe

Return 0 while probing success.

Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/pinctrl-sirf.c b/drivers/pinctrl/pinctrl-sirf.c
index 7fca6ce..53aa6e2 100644
--- a/drivers/pinctrl/pinctrl-sirf.c
+++ b/drivers/pinctrl/pinctrl-sirf.c
@@ -1670,6 +1670,8 @@
 		irq_set_handler_data(bank->parent_irq, bank);
 	}
 
+	return 0;
+
 out:
 	iounmap(regs);
 	return err;