scsi: libsas: Annotate fall-through in a switch statement

Signed-off-by: Bart Van Assche <[e-mail]>
Reviewed-by: Christoph Hellwig <[e-mail]>
Reviewed-by: Hannes Reinecke <[e-mail]>
Cc: Johannes Thumshirn <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/libsas/sas_ata.c

···
 	case SAS_END_DEVICE:
 		if (ex_phy->attached_sata_dev)
 			return sas_ata_clear_pending(dev, ex_phy);
+		/* fall through */
 	default:
 		return -ENODEV;
 	}