qcacmn: add dp_tx_send_exception

dp_tx_send_exception is an exception path that transmits frames
through FW by setting DP_TX_DESC_FLAG_TO_FW

Change-Id: Id6abfcd2bf060c4fe3aaca91634f3be501530a7e
CRs-Fixed: 2176814

dp/wifi3.0/dp_tx.h

@@ -143,6 +143,8 @@ QDF_STATUS dp_tx_pdev_detach(struct dp_pdev *pdev);
 QDF_STATUS dp_tx_pdev_attach(struct dp_pdev *pdev);
 
 qdf_nbuf_t dp_tx_send(void *data_vdev, qdf_nbuf_t nbuf);
+qdf_nbuf_t dp_tx_send_exception(void *data_vdev, qdf_nbuf_t nbuf,
+				struct cdp_tx_exception_metadata *tx_exc);
 
 #ifdef CONVERGED_TDLS_ENABLE
 qdf_nbuf_t dp_tx_non_std(struct cdp_vdev *vdev_handle,