[ARM] arm/kernel/arthur.c: add MODULE_LICENSE

This patch adds the missing MODULE_LICENSE("GPL").
Signed-off-by: NAdrian Bunk <bunk@kernel.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch/arm/kernel/arthur.c

@@ -90,3 +90,5 @@ static void __exit arthur_exit(void)
 
 module_init(arthur_init);
 module_exit(arthur_exit);
+
+MODULE_LICENSE("GPL");