TX Power Service Server API

src/ble/gatt-service/tx_power_service_server.h

/**
 * @brief Init TX Power Service Server with ATT DB
 * @param tx_power_level
 */
void tx_power_service_server_init(int8_t tx_power_level);

/**
 * @brief Update TX power level
 * @param tx_power_level_dBm range [-100,20]
 */
void tx_power_service_server_set_level(int8_t tx_power_level_dBm);