PopMetal-RK3288 board could enable SD3.0 card but need vccio_sd
to support the voltage range from 1V8 to 3V3 and we also need to
add more UHS mode here.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>