rockchip: dts: rk3399-evb: support boot from sd-card

Enable sdmmc node in SPL and add it to boot order.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
[Fixed commit tags:]
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
1 file changed