bool vnt_ofdm_min_rate(struct vnt_private *priv);
int vnt_adjust_tsf(struct vnt_private *priv, u8 rx_rate,
u64 time_stamp, u64 local_tsf);
-bool vnt_get_current_tsf(struct vnt_private *priv, u64 *current_tsf);
bool vnt_clear_current_tsf(struct vnt_private *priv);
int vnt_reset_next_tbtt(struct vnt_private *priv, u16 beacon_interval);
int vnt_update_next_tbtt(struct vnt_private *priv, u64 tsf,