Your logs look like the USB 3.0 SS issue. Please follow the note and try with USB 2.0 port (better 2.0 cable). Thanks.
If you still have the issue, please provide the host dmesg log and the target flashing kernel log with the below description:
For the host dmesg log, on the x86 host where you are running SDKM, open a terminal window and enter the command “dmesg -T”
For the target flashing kernel logs, in another terminal window on the host you need to open a minicom connection to the Tegra (“sudo minicom -w -D /dev/ttyACM0”), redo the flashing, and copy paste the output to a file.