Give the mac controller the correct tx-delay and rx-delay value for the rgmii mode transmission. If they are not matched, there would be Ethernet packets lost, the net feature may not work. Signed-off-by: David Wu <david.wu@rock-chips.com> Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com> Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>