ARM: dts: sun8i: h3: nanopi-m1-plus: fix missing ethernet 0 in aliases

This patch fixes a missing ethernet 0 alisas in the devicetree on the
Nanopi M1 Plus.

Signed-off-by: Philipp Rossak <embed3d@gmail.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>