AE_MDIO_CLK_MASK
((AE_MDIO_CLK_25_4 << AE_MDIO_CLK_SHIFT) & AE_MDIO_CLK_MASK);
((AE_MDIO_CLK_25_4 << AE_MDIO_CLK_SHIFT) & AE_MDIO_CLK_MASK) |