scsi: libsas: Delete SAS_SG_ERR

No LLDD sets exec status as SAS_SG_ERR, so remove support.

Link: https://lore.kernel.org/r/[e-mail]
Tested-by: Damien Le Moal <[e-mail]>
Signed-off-by: John Garry <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/libsas/sas_ata.c

···
 	case SAS_DATA_OVERRUN:
 	case SAS_QUEUE_FULL:
 	case SAS_DEVICE_UNKNOWN:
-	case SAS_SG_ERR:
-		return AC_ERR_INVALID;
 	case SAS_OPEN_TO:
 	case SAS_OPEN_REJECT:
 		pr_warn("%s: Saw error %d.  What to do?\n",

drivers/scsi/libsas/sas_scsi_host.c

···
 		case SAS_DEVICE_UNKNOWN:
 			hs = DID_BAD_TARGET;
 			break;
-		case SAS_SG_ERR:
-			hs = DID_PARITY;
-			break;
 		case SAS_OPEN_REJECT:
 			if (ts->open_rej_reason == SAS_OREJ_RSVD_RETRY)
 				hs = DID_SOFT_ERROR; /* retry */

include/scsi/libsas.h

···
 	SAS_INTERRUPTED,
 	SAS_QUEUE_FULL,
 	SAS_DEVICE_UNKNOWN,
-	SAS_SG_ERR,
 	SAS_OPEN_REJECT,
 	SAS_OPEN_TO,
 	SAS_PROTO_RESPONSE,