scsi: csiostor: Fix fall-through warnings for Clang

In preparation to enable -Wimplicit-fallthrough for Clang, fix a warning by
explicitly adding a break statement instead of letting the code fall
through to the next case.

Link: https://github.com/KSPP/linux/issues/115
Link: https://lore.kernel.org/r/b77ee091548f16b52056c3b9ee8c76dc6691f868.1605896060.git.gustavoars@kernel.orgSigned-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/csiostor/csio_wr.c

@@ -830,6 +830,7 @@ csio_wr_destroy_queues(struct csio_hw *hw, bool cmd)
 				if (flq_idx != -1)
 					csio_q_flid(hw, flq_idx) = CSIO_MAX_QID;
 			}
+			break;
 		default:
 			break;
 		}