rpmsg: added MODULE_ALIAS for rpmsg_char

Added "rpmsg:rpmsg_chrdev" MODULE_ALIAS to autoload
rpmg_chrdev module automatically.
Signed-off-by: NRamon Fried <rfried@codeaurora.org>
Signed-off-by: NBjorn Andersson <bjorn.andersson@linaro.org>

drivers/rpmsg/rpmsg_char.c

@@ -581,4 +581,6 @@ static void rpmsg_chrdev_exit(void)
 	unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX);
 }
 module_exit(rpmsg_chrdev_exit);
+
+MODULE_ALIAS("rpmsg:rpmsg_chrdev");
 MODULE_LICENSE("GPL v2");