MT7621 WiFi AX routers

[O_o]

Test by @anon78773196:

• Speed test without SQM = 750 Mb/s
• Speed test with SQM = 370 to 411 Mb/s

ARMv7 vs ARMv8 Latencies (ARMv8 = Belkin RT3200)

@anon50098793

I notice quite a bit of difference with the Raspberry PI 4 (ARMv8) compared to the IPQ806x (ARMv7)... even on 50/15... so guessing a fair bit is tied up in interrupt latencies et. al./scaling-as-above? rather than raw bandwidth... but thats just a random guestimate/2c...