qcacmn: Add internal stop send event

In current code, EV_DOWN event in stop-progress sub state sends
stop command to FW, As EV_DOWN is generic, it is casuing multiple
stop commands to FW. To avoid, for internal transitions added new
event STOP_REQ, which send stop command to FW

EV_DOWN event is not honored in STOP state, as it is not initial state

Change-Id: I5a3b44ab6e12f6d1c2d10ad55954c6a0510e5f9e
CRS-Fixed: 2401298

umac/mlme/mlme_objmgr/dispatcher/inc/wlan_vdev_mlme_main.h

@@ -101,6 +101,7 @@ enum wlan_vdev_state {
  * @WLAN_VDEV_SM_EV_MLME_DOWN_REQ:       Invoke DOWN command operation
  * @WLAN_VDEV_SM_EV_DOWN_COMPLETE:       Notification of DOWN complete
  * @WLAN_VDEV_SM_EV_ROAM:                Notifiction on ROAMING
+ * @WLAN_VDEV_SM_EV_STOP_REQ:            Invoke API to initiate STOP handshake
  */
 enum wlan_vdev_sm_evt {
 	WLAN_VDEV_SM_EV_START = 0,
@@ -132,6 +133,7 @@ enum wlan_vdev_sm_evt {
 	WLAN_VDEV_SM_EV_MLME_DOWN_REQ = 26,
 	WLAN_VDEV_SM_EV_DOWN_COMPLETE = 27,
 	WLAN_VDEV_SM_EV_ROAM = 28,
+	WLAN_VDEV_SM_EV_STOP_REQ = 29,
 };
 
 #else