Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) Partial implementation of various ring layouts, useful to tune virtio design.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) Uses shared memory heavily.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) Typical use:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) # sh run-on-all.sh perf stat -r 10 --log-fd 1 -- ./ring