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rtwn: fix rtl8812/rtl8821 vht definitions, add VHT calibration/rate control

Description

rtwn: fix rtl8812/rtl8821 vht definitions, add VHT calibration/rate control

  • Add support for 80MHz channels during IQ calibration
  • Correct the RAID flags for 1 and 2 stream VHT - the later ones are for 2GHz VHT and then 3/4 stream VHT
  • Add VHT to the RAID calculation for when we eventually transmit VHT rates.

Obtained from: Linux rtw88 (https://github.com/lwfinger/rtw88)

Differential Revision: https://reviews.freebsd.org/D47774