scsi: remove MSG_*_TAG defines

For SPI drivers use the message definitions from scsi.h, and for target
drivers introduce a new TCM_*_TAG namespace.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com
diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c
index bc286a6..1307600 100644
--- a/drivers/target/target_core_spc.c
+++ b/drivers/target/target_core_spc.c
@@ -1357,7 +1357,7 @@
 		 * Do implicit HEAD_OF_QUEUE processing for INQUIRY.
 		 * See spc4r17 section 5.3
 		 */
-		cmd->sam_task_attr = MSG_HEAD_TAG;
+		cmd->sam_task_attr = TCM_HEAD_TAG;
 		cmd->execute_cmd = spc_emulate_inquiry;
 		break;
 	case SECURITY_PROTOCOL_IN:
@@ -1391,7 +1391,7 @@
 		 * Do implicit HEAD_OF_QUEUE processing for REPORT_LUNS
 		 * See spc4r17 section 5.3
 		 */
-		cmd->sam_task_attr = MSG_HEAD_TAG;
+		cmd->sam_task_attr = TCM_HEAD_TAG;
 		break;
 	case TEST_UNIT_READY:
 		cmd->execute_cmd = spc_emulate_testunitready;