stmmac: dwmac-loongson: Make sure MDIO is initialized before use
[ Upstream commit e87d3a13 ] Generic code will use mdio. If it is not initialized before use, the kernel will Oops. Fixes: 30bba69d ("stmmac: pci: Add dwmac support for Loongson") Signed-off-by: Yanteng Si <siyanteng@loongson.cn> Signed-off-by: Feiyang Chen <chenfeiyang@loongson.cn> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>
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63387fe8
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