RX/TX delay on OrangePi Win board is set on PHY. Reflect that in
ethernet node.

Fixes: 93d6a27c ("arm64: dts: allwinner: a64: Orange Pi Win: Add Ethernet node")
Signed-off-by: NJernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: NMaxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20201022185839.2779245-1-jernej.skrabec@siol.net