wlc_lcnphy_load_tx_iir_filter
wlc_lcnphy_load_tx_iir_filter(pi, false, 3);
wlc_lcnphy_load_tx_iir_filter(pi, false, 2);
wlc_lcnphy_load_tx_iir_filter(pi, true, 0);
wlc_lcnphy_load_tx_iir_filter(pi, true, 3);