we do not maintain our own (modified) ad9361 driver anymore! The original ad9361 driver in the Linux kernel tree can be used with some extra EXPORT_SYMBOL.
1. add git revision software register 7 to DRV_XPU module (not FPGA XPU module)
2. fix the print of hdr->seq_ctrl in sdr.c
3. add ht_flag display to sdr.c
4. remove the sysid from devicetree because new we have our own git revision read back solution in FPGA (XPU register 63) and driver (the sotware register 7 of drv_xpu)
5. add sudo to update_sdcard.sh to make the image generation without SD card in the test-bed easier
