ide/ppc/pmac.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>

drivers/ide/ppc/pmac.c

@@ -1771,3 +1771,5 @@ static int __devinit pmac_ide_setup_dma(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif)
 #endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
 
 module_init(pmac_ide_probe);
+
+MODULE_LICENSE("GPL");