soc: imx8m: Add MODULE_LICENSE

Add MODULE_LICENSE to support building as module.

Signed-off-by: Jindong Yue <[email protected]>
Reviewed-by: Peng Fan <[email protected]>
Reviewed-by: Marco Felsch <[email protected]>
Signed-off-by: Shawn Guo <[email protected]>

Author: JDYue

drivers/soc/imx/soc-imx8m.c

@@ -242,3 +242,4 @@ static int __init imx8_soc_init(void)
 	return ret;
 }
 device_initcall(imx8_soc_init);
+MODULE_LICENSE("GPL");