ide/pci/cmd640.c: add MODULE_LICENSE

Now that it can be built modular 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/pci/cmd640.c b/drivers/ide/pci/cmd640.c
index ec66798..29fbc5e 100644
--- a/drivers/ide/pci/cmd640.c
+++ b/drivers/ide/pci/cmd640.c
@@ -881,3 +881,5 @@
 MODULE_PARM_DESC(probe_vlb, "probe for VLB version of CMD640 chipset");
 
 module_init(cmd640x_init);
+
+MODULE_LICENSE("GPL");