The Ethernet PHY on the Bananapi M1+ has the RX and TX delays
enabled on the PHY, using pull-ups on the RXDLY and TXDLY pins.

Fix the phy-mode description to correct reflect this so that the
implementation doesn't reconfigure the delays incorrectly. This
happened with commit bbc4d71d ("net: phy: realtek: fix rtl8211e
rx/tx delay config").

Fixes: 04c85eca ("ARM: dts: sun7i: Add dts file for Bananapi M1 Plus board")
Signed-off-by: NChen-Yu Tsai <wens@csie.org>
Signed-off-by: NMaxime Ripard <maxime@cerno.tech>
Acked-by: NJernej Skrabec <jernej.skrabec@siol.net>
Link: https://lore.kernel.org/r/20201024162515.30032-4-wens@kernel.org