MDIO_REG_ADDR_MASK is already applied in function
atl1c_write_phy_reg and atl1c_read_phy_reg
Signed-off-by: Nxiong <xiong@qca.qualcomm.com>
Tested-by: NLiu David <dwliu@qca.qualcomm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>