arm64: dts: allwinner: t527: add EMAC0 to Avaota-A1 board

On Avaota A1 board, the EMAC0 connect to an external RTL8211F-CG PHY,
which features a 25MHz crystal, and using PH8 pin as PHY reset.

Signed-off-by: Yixun Lan <dlan@gentoo.org>
Link: https://patch.msgid.link/20250430-01-sun55i-emac0-v3-5-6fc000bbccbd@gentoo.org


Signed-off-by: Chen-Yu Tsai <wens@csie.org>