* @supported_rates: Rate types which are supported (CCK, OFDM).
* @num_channels: Number of supported channels. This is used as array size
* for @tx_power_a, @tx_power_bg and @channels.
* @supported_rates: Rate types which are supported (CCK, OFDM).
* @num_channels: Number of supported channels. This is used as array size
* for @tx_power_a, @tx_power_bg and @channels.