create common_ip and common_ipi-bd to minimize local storage
add gitkeep to keep the directory structure
in duifei_cal_coarse, split tx and rx ila, resynthesis with new ad9361 rx mapping strategy
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
josh