Function esp_idf_svc::sys::esp_ble_gatt_set_local_mtu

pub unsafe extern "C" fn esp_ble_gatt_set_local_mtu(mtu: u16) -> i32

@brief This function is called to set local MTU, the function is called before BLE connection.

@param[in] mtu: the size of MTU.

@return - ESP_OK: success - other: failed