ide: move blk_register_region() call out from init_gendisk()

Move blk_register_region() call out from init_gendisk() to hwif_init().

There should be no functionality changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 4d5291c..74b0245 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -1200,8 +1200,6 @@
 		drive->gendev.driver_data = drive;
 		drive->gendev.release = drive_release_dev;
 	}
-	blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
-			THIS_MODULE, ata_probe, ata_lock, hwif);
 }
 
 static int hwif_init(ide_hwif_t *hwif)
@@ -1261,6 +1259,8 @@
 
 done:
 	init_gendisk(hwif);
+	blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
+			    THIS_MODULE, ata_probe, ata_lock, hwif);
 	ide_acpi_init(hwif);
 	return 1;