net: ethernet: mtk_eth_soc: do not overwrite mtu configuration running reset routine

net: ethernet: mtk_eth_soc: do not overwrite mtu configuration running reset routine

[ Upstream commit b677d6c7a695dad1b02d2e0e428c39b3b344f270 ]

Restore user configured MTU running mtk_hw_init() during tx timeout routine
since it will be overwritten after a hw reset.

Reported-by: Felix Fietkau <nbd@nbd.name>
Fixes: 9ea4d311509f ("net: ethernet: mediatek: add the whole ethernet reset into the reset process")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>