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>
diff --git a/drivers/ide/ide-pnp.c b/drivers/ide/ide-pnp.c
index b163b2e..c14bb53 100644
--- a/drivers/ide/ide-pnp.c
+++ b/drivers/ide/ide-pnp.c
@@ -86,3 +86,5 @@
 
 module_init(pnpide_init);
 module_exit(pnpide_exit);
+
+MODULE_LICENSE("GPL");