Based on the README.uefi we have everything already enabled for it with the exception of CONFIG_BLK (the uclass Kconfig entry while the s5p-mmc uses the legacy HAVE_BLOCK_DEVICE) so it may already work. However, I have no way of testing this, so I'll leave this open until someone can confirm if it works.
As suggested by @kwizart in #29
Based on the README.uefi we have everything already enabled for it with the exception of CONFIG_BLK (the uclass Kconfig entry while the s5p-mmc uses the legacy HAVE_BLOCK_DEVICE) so it may already work. However, I have no way of testing this, so I'll leave this open until someone can confirm if it works.