B43_LPPHY_TX_PWR_CTL_DELTAPWR_LIMIT
b43_phy_mask(dev, B43_LPPHY_TX_PWR_CTL_DELTAPWR_LIMIT, 0xFF);
b43_phy_write(dev, B43_LPPHY_TX_PWR_CTL_DELTAPWR_LIMIT, 0xA);