rockchip: rk3288-firefly: Include sdmmc regulator in SPL

Add bootph props and enable related Kconfig options to include the sdmmc
regulator in SPL. Also enable SPL_DM_SEQ_ALIAS to ensure aliases is
handled correctly in SPL.

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