rockchip: rk3588-toybrick-x0: Migrate to OF_UPSTREAM

The device tree for Rockchip Toybrick TB-RK3588X has been merged into
dts/upstream with devicetree-rebasing v6.10-dts, migrate board to
OF_UPSTREAM.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
2 files changed