arm64: dts: rockchip: Enable wifi module AP6398s for rk3566 box demo

There is a AP6398s wifi/bt module on this board.
Fix the sdmmc1 dt node to make wifi work.

Signed-off-by: Andy Yan <andyshrk@163.com>
Link: https://lore.kernel.org/r/20221229115111.3899793-1-andyshrk@163.com


Signed-off-by: Heiko Stuebner <heiko@sntech.de>