arm64: dts: rockchip: Fix network on rk3576 evb1 board

arm64: dts: rockchip: Fix network on rk3576 evb1 board

The RK3576 EVB1 has a RTL8211F PHY for each GMAC interface with
a dedicated reset line and the 25MHz clock provided by the SoC.
The current description results in non-working Ethernet as the
clocks are only enabled by the PHY driver, but probing the right
PHY driver currently requires that the PHY ID register can be read
for automatic identification.

This fixes up the network description to get the network functionality
working reliably and cleans up usage of deprecated DT properties while
at it.

Fixes: f135a1a07352 ("arm64: dts: rockchip: Add rk3576 evb1 board")
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20250910-rk3576-evb-network-v1-1-68ed4df272a2@collabora.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>