Fixed errors during compilation of OpenWRT kernel modules

Let lbt sdrctl command show richer info for set_lbt_th.sh

Easier way to set arbitrary trx frequency via register rf 1 and 5:
Create helper function ad9361_tx_calibration() and openwifi_rf_rx_update_after_tuning() for frequency tuning. No matter it is from L

Easier way to set arbitrary trx frequency via register rf 1 and 5:
Create helper function ad9361_tx_calibration() and openwifi_rf_rx_update_after_tuning() for frequency tuning. No matter it is from Linux request or rf register 1 (Tx freq override MHz) and 5 (Rx freq override MHz)

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Move sdrctl testmode cmd out to sdrctl_intf.c