ARM: u300: regulator: add MODULE_LICENSE()

The missing license showed up as a randconfig warning now, no idea
why we never saw that earlier.
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm/mach-u300/regulator.c

@@ -130,3 +130,5 @@ static int __init u300_init_boardpower(void)
 }
 
 device_initcall(u300_init_boardpower);
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Linus Walleij");