delete redundant file in dl814_k7_basic; simply duifei_cmos to duifei_basic and archive the project; rename duifei_cmos to duifei_cal_coarse and add ad9361 multichip calibration function, but not tested
dl814_k7_basic is the driver instance of board smq7k410t_b9361, along with basic clock, adc and dac configurations; include nulling algorithm into dl814_z7 project