arm64: dts: mediatek: mt8395-genio-1200-evk: Fix dtbs_check error for phy

arm64: dts: mediatek: mt8395-genio-1200-evk: Fix dtbs_check error for phy

The ethernet-phy node in mt8395-genio-1200-evk.dts was triggering a
dtbs_check error. The error message was:
  eth-phy0@1: $nodename:0: 'eth-phy0@1' does not match
              '^ethernet-phy(@[a-f0-9]+)?$'
Fix this issue by replacing 'eth-phy' node to generic 'ethernet-phy'.

Fixes: f2b543a191b6 ("arm64: dts: mediatek: add device-tree for Genio 1200 EVK board")
Signed-off-by: Macpaul Lin <macpaul.lin@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20241002051620.2050-3-macpaul.lin@mediatek.com
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>