ide-pnp.c: add MODULE_LICENSE

Now that it's in an own module it needs a MODULE_LICENSE.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-pnp.c

@@ -86,3 +86,5 @@ static void __exit pnpide_exit(void)
 
 module_init(pnpide_init);
 module_exit(pnpide_exit);
+
+MODULE_LICENSE("GPL");