kernel: backport mtk_soc_eth fixes from v5.13

kernel: backport mtk_soc_eth fixes from v5.13

Fixes logic that leads to this error when booting mt7621 and other
devices that use the mediatek ethernet driver:
  [   23.144378] mtk_soc_eth 1e100000.ethernet: PPE table busy

The rest are mostly moved from pending-5.10 to backport-5.10 with a
couple of cleanups and improvements from upstream.

Refresh patches.

Links:
    https://git.kernel.org/netdev/net-next/c/c5d66587b890
    https://git.kernel.org/netdev/net-next/c/3f57d8c40fea
    https://git.kernel.org/netdev/net-next/c/5196c4178549
    https://git.kernel.org/netdev/net-next/c/787082ab9f7b
    https://git.kernel.org/netdev/net-next/c/c30c4a827390
    https://git.kernel.org/netdev/net-next/c/3630d519d7c3
    https://git.kernel.org/netdev/net-next/c/16ef670789b2
    https://git.kernel.org/netdev/net-next/c/59555a8d0dd3
    https://git.kernel.org/netdev/net-next/c/6b4423b258b9
    https://git.kernel.org/netdev/net-next/c/e9229ffd550b
    https://git.kernel.org/netdev/net-next/c/4e6bf609569c
    https://git.kernel.org/netdev/net-next/c/816ac3e6e67b
    https://git.kernel.org/netdev/net-next/c/16769a8923fa
    https://git.kernel.org/netdev/net-next/c/db2c7b353db3
    https://git.kernel.org/netdev/net-next/c/fa817272c37e
    https://git.kernel.org/netdev/net-next/c/3bc8e0aff23b

Fixes: f07fe36f22fc ("kernel: update flow offload patches to upstream version")
Cc: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>