i2c: change twl4030-usb back to subsys_initcall

without it, otg_get/set_transceiver won't be useful and
twl4030-usb transceiver won't get to musb code.
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

drivers/i2c/chips/twl4030-usb.c

@@ -774,7 +774,7 @@ static int __init twl4030_usb_init(void)
 {
 	return platform_driver_register(&twl4030_driver);
 }
-module_init(twl4030_usb_init);
+subsys_initcall(twl4030_usb_init);
 
 static void __exit twl4030_usb_exit(void)
 {