Fix a bug where an ide-pmac hwif returned to the system because it's empty

would still be probed thus causing a crash on some machines. Also fix some
whitespace/tabs.

drivers/ide/ppc/pmac.c

@@ -1180,6 +1180,7 @@ pmac_ide_setup_device(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif)
 		for (i = IDE_DATA_OFFSET; i <= IDE_CONTROL_OFFSET; ++i)
 			hwif->io_ports[i] = 0;
 		hwif->chipset = ide_unknown;
+		hwif->noprobe = 1;
 		return -ENODEV;
 	}