scsi: myrb: Mark expected switch fall-throughs

In preparation to enabling -Wimplicit-fallthrough, mark switch cases where
we are expecting to fall through.

Addresses-Coverity-ID: 1465234 ("Missing break in switch")
Addresses-Coverity-ID: 1465238 ("Missing break in switch")
Addresses-Coverity-ID: 1465242 ("Missing break in switch")
Signed-off-by: NGustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/myrb.c

@@ -1527,6 +1527,7 @@ static int myrb_ldev_queuecommand(struct Scsi_Host *shost,
 			scmd->scsi_done(scmd);
 			return 0;
 		}
+		/* fall through */
 	case WRITE_6:
 		lba = (((scmd->cmnd[1] & 0x1F) << 16) |
 		       (scmd->cmnd[2] << 8) |
@@ -1543,6 +1544,7 @@ static int myrb_ldev_queuecommand(struct Scsi_Host *shost,
 			scmd->scsi_done(scmd);
 			return 0;
 		}
+		/* fall through */
 	case WRITE_10:
 	case VERIFY:		/* 0x2F */
 	case WRITE_VERIFY:	/* 0x2E */
@@ -1559,6 +1561,7 @@ static int myrb_ldev_queuecommand(struct Scsi_Host *shost,
 			scmd->scsi_done(scmd);
 			return 0;
 		}
+		/* fall through */
 	case WRITE_12:
 	case VERIFY_12: /* 0xAF */
 	case WRITE_VERIFY_12:	/* 0xAE */