pinctrl: ingenic: Probe driver at subsys_initcall

Using postcore_initcall() makes the driver try to initialize way too
early.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-ingenic.c

@@ -847,4 +847,4 @@ static int __init ingenic_pinctrl_drv_register(void)
 {
 	return platform_driver_register(&ingenic_pinctrl_driver);
 }
-postcore_initcall(ingenic_pinctrl_drv_register);
+subsys_initcall(ingenic_pinctrl_drv_register);