img_mgmt: fix callback parameter values

Start, ongoing and complete states are now used in the callback

Signed-off-by: Jamie McCrae <jamie.mccrae@lairdconnect.com>
diff --git a/cmd/img_mgmt/src/img_mgmt.c b/cmd/img_mgmt/src/img_mgmt.c
index b86d0ae..6e28906 100644
--- a/cmd/img_mgmt/src/img_mgmt.c
+++ b/cmd/img_mgmt/src/img_mgmt.c
@@ -515,6 +515,8 @@
             }
         }
 #endif
+    } else {
+        cmd_status_arg.status = IMG_MGMT_ID_UPLOAD_STATUS_ONGOING;
     }
 
     /* Write the image data to flash. */
@@ -542,7 +544,7 @@
             if (g_img_mgmt_state.off == g_img_mgmt_state.size) {
                 /* Done */
                 img_mgmt_dfu_pending();
-                cmd_status_arg.status = IMG_MGMT_ID_UPLOAD_STATUS_ONGOING;
+                cmd_status_arg.status = IMG_MGMT_ID_UPLOAD_STATUS_COMPLETE;
                 g_img_mgmt_state.area_id = -1;
             }
         }