ARM: dts: at91: sama5d2: fix compilation warning

Fix the following compilation warning:
arch/arm/boot/dts/sama5d2.dtsi:371.29-382.6: Warning
(avoid_unnecessary_addr_size): /ahb/apb/ethernet@f8008000:
unnecessary #address-cells/#size-cells without "ranges" or child "reg" property
also defined at arch/arm/boot/dts/at91-sama5d2_icp.dts:353.8-363.3

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20220615080633.1881196-2-claudiu.beznea@microchip.com