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

This patch adds the missing MODULE_LICENSE("GPL").

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/kernel/arthur.c b/arch/arm/kernel/arthur.c
index 0ee2e98..321c529 100644
--- a/arch/arm/kernel/arthur.c
+++ b/arch/arm/kernel/arthur.c
@@ -90,3 +90,5 @@
 
 module_init(arthur_init);
 module_exit(arthur_exit);
+
+MODULE_LICENSE("GPL");