CONF_TX_MCS_RATES
supported_rates = CONF_TX_ENABLED_RATES | CONF_TX_MCS_RATES;
supported_rates = CONF_TX_ENABLED_RATES | CONF_TX_MCS_RATES |
supported_rates = CONF_TX_ENABLED_RATES | CONF_TX_MCS_RATES |
supported_rates |= CONF_TX_MCS_RATES;