iwl_send_bt_env
int iwl_send_bt_env(struct iwl_priv *priv, u8 action, u8 type);
ret = iwl_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
ret = iwl_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
ret = iwl_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,