qcacmn: Update mlo ctx stats API with xmit type

Update mlo ctx stats API with xmit type. MLO ctx ingress stats will
be stored as per the legacy/mlo xmit type.

Update stats incrementing mechanism on peer unmap.

Change-Id: I2f16b95e64e6a7697d18d9453e9f7c60631f80bb
CRs-Fixed: 3561679

dp/inc/cdp_txrx_cmn_struct.h

@@ -2005,11 +2005,13 @@ enum cdp_stats {
  * @UPDATE_PEER_STATS: update peer stats
  * @UPDATE_VDEV_STATS: update vdev stats
  * @UPDATE_PDEV_STATS: Update pdev stats
+ * @UPDATE_VDEV_STATS_MLD: Update mld vdev stats
  */
 enum cdp_stat_update_type {
 	UPDATE_PEER_STATS = 0,
 	UPDATE_VDEV_STATS = 1,
 	UPDATE_PDEV_STATS = 2,
+	UPDATE_VDEV_STATS_MLD = 3,
 };
 
 /**