Xiaomi mi4a gigabit (mt7621AT) hardware NAT not working using master branch

[db260179]

MT7621 - 21.02/Master feedback firmware image test - IPV6 offload and disabled Flow Control

Hi MT7621 owners, As you know, having owned an mt7621 router there is an annoying bug that plagues us all. the netdev timeout issue! - this issue is related to the way the flow control is forced on the mt7530 switch and because its connected to the mt7621, there is a weird bug that triggers miss timing causing the mt7621 cpu to fall over and crash. I've played around with several of my mt7621 routers and noticed all of them will have this issue when the flow control is forced for RX/TX - by d…

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