gen_tbl.py flattens the RTL8821A MAC / baseband / AGC / RF tables of the Realtek Linux driver
(hal/phydm/rtl8821a/halhwimg8821a_*.c, from morrownr/8821au-20210708) into rtl8821au\src\rtl8821_tbl.c.
The REF and OUT paths at the top are the author's; edit them. Run it with Python 3.
