WiFi 6 Support

[kphanipavan]

Adds partial wifi 6 support.

Connection Test Screenshot:

Tested on an RTL8852BE WifFi 6 PCIe Card for hotspot and a Samsung S24+ Phone as host

Command used for testing:
sudo /usr/local/bin/lnxrouter --dns 127.0.0.1 -d --ap $interface rock5boi -p asiudfbla --no-virt -c 149 --freq-band 5 -w "1+2" --no-virt --hs20 --wifi4 --req-ht --ht-capab "[HT40+][HT40-][LDPC][SHORT-GI-20][SHORT-GI-40][TX-STBC][RX-STBC1][MAX-AMSDU-7935][DSSS_CCK-40][SMPS-STATIC]" --wifi5 --req-vht --vht-capab "[MAX-MPDU-11454][RXLDPC][SHORT-GI-80][TX-STBC-2BY1][SU-BEAMFORMEE][HTC-VHT]" --vht-ch-width 1 --vht-seg0-ch 155 --country BZ --no-dnsmasq -g 10.9.8.1 --ieee80211ax --he-ch-width 1 --he-seg0-ch 155

New arguments:

1. --wifi6 Enable IEEE 802.11ax (HE)
2. --req-he Require station HE (High Efficiency) mode
3. --he-ch-width <index> Index of HE channel width:
   0 for 20MHz or 40MHz (default)
   1 for 80MHz
   2 for 160MHz
   3 for 80+80MHz (Non-contigous 160MHz)
4. --he-seg0-ch <channel> Channel index of HE center frequency for primary
   segment. Use with '--he-ch-width'
5. --he-seg1-ch <channel> Channel index of HE center frequency for secondary
   (second 80MHz) segment. Use with '--he-ch-width 3'

Above arguments operate similar to their wifi5 counterparts.

Notes:

• Wifi 6 requires hostapd built with wifi 6 support, with "CONFIG_IEEE80211AX=y" in buildconf
• Wifi 6 hotspot only works with wifi 6 cards only
• Requires additional testing
• Need to add more HE capabilities to the script.
• Wifi 6 is backward compatible with wifi 5 clients only if --req-he is NOT used.

Error when trying to connect with a WiFi 5 client to a WiFi 6 Hotspot WITH `--req-he`

Red box shows the error when a wifi 5 client tries to connect when --req-he is used. Green box shows a successful connection to a wifi 6 client

[garywill]

Sorry for late reply. Could you please rebase? Your commit seems to base on a quite old branch