bwn_phy_g_switch_chan
bwn_phy_g_switch_chan(mac, 7, 0);
bwn_phy_g_switch_chan(mac, old_channel, 0);
bwn_phy_g_switch_chan(mac, (old_channel >= 8) ? 1 : 13, 0);
bwn_phy_g_switch_chan(mac, old_channel, 0);
bwn_phy_g_switch_chan(mac, 6, 0);
bwn_phy_g_switch_chan(mac, sav->old_channel, 1);
bwn_phy_g_switch_chan(mac, 6, 1);
bwn_phy_g_switch_chan(mac, channel, 0);
bwn_phy_g_switch_chan(mac, newchan, 0);
static void bwn_phy_g_switch_chan(struct bwn_mac *, int, uint8_t);