scsi: hpsa: mark expected switch fall-throughs

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

Addresses-Coverity-ID: 1195463 ("Missing break in switch")
Addresses-Coverity-ID: 1195464 ("Missing break in switch")
Addresses-Coverity-ID: 1195465 ("Missing break in switch")
Addresses-Coverity-ID: 1195466 ("Missing break in switch")
Addresses-Coverity-ID: 1357338 ("Missing break in switch")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Acked-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/hpsa.c

@@ -4663,6 +4663,7 @@ static int fixup_ioaccel_cdb(u8 *cdb, int *cdb_len)
 	case WRITE_6:
 	case WRITE_12:
 		is_write = 1;
+		/* fall through */
 	case READ_6:
 	case READ_12:
 		if (*cdb_len == 6) {
@@ -5093,6 +5094,7 @@ static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h,
 	switch (cmd->cmnd[0]) {
 	case WRITE_6:
 		is_write = 1;
+		/* fall through */
 	case READ_6:
 		first_block = (((cmd->cmnd[1] & 0x1F) << 16) |
 				(cmd->cmnd[2] << 8) |
@@ -5103,6 +5105,7 @@ static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h,
 		break;
 	case WRITE_10:
 		is_write = 1;
+		/* fall through */
 	case READ_10:
 		first_block =
 			(((u64) cmd->cmnd[2]) << 24) |
@@ -5115,6 +5118,7 @@ static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h,
 		break;
 	case WRITE_12:
 		is_write = 1;
+		/* fall through */
 	case READ_12:
 		first_block =
 			(((u64) cmd->cmnd[2]) << 24) |
@@ -5129,6 +5133,7 @@ static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h,
 		break;
 	case WRITE_16:
 		is_write = 1;
+		/* fall through */
 	case READ_16:
 		first_block =
 			(((u64) cmd->cmnd[2]) << 56) |