usb: chipidea: usbmisc_imx6q: Staticize usbmisc_imx6q_drv_init/exit()

Staticize usbmisc_imx6q_drv_init/exit() to fix the following sparse warnings:

drivers/usb/chipidea/usbmisc_imx6q.c:147:12: warning: symbol 'usbmisc_imx6q_drv_init' was not declared. Should it be static?
drivers/usb/chipidea/usbmisc_imx6q.c:153:13: warning: symbol 'usbmisc_imx6q_drv_exit' was not declared. Should it be static?
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/chipidea/usbmisc_imx6q.c

@@ -144,13 +144,13 @@ static struct platform_driver usbmisc_imx6q_driver = {
 	 },
 };
 
-int __init usbmisc_imx6q_drv_init(void)
+static int __init usbmisc_imx6q_drv_init(void)
 {
 	return platform_driver_register(&usbmisc_imx6q_driver);
 }
 subsys_initcall(usbmisc_imx6q_drv_init);
 
-void __exit usbmisc_imx6q_drv_exit(void)
+static void __exit usbmisc_imx6q_drv_exit(void)
 {
 	platform_driver_unregister(&usbmisc_imx6q_driver);
 }