hekate main always runs in compatibility mode (SDR82).
This ensures speed on boot process.
Nyx will first try SDR104.
If the sd card is a sandisk U1 and fails, it will try the compatibility mode.
After that it fallbacks to lower bus speeds.
Both support 1bit mode for broken sd card readers.
Having the new error checking in the sdmmc driver, allows for all that to work.
It can now fail instead of continuing, like how HOS reacts.
Using the key `emupath` on a boot entry will load the selected emuMMC.
This can also be forced by using the correct boot cfg storage bit and writing the path at the emummc path offset. Check readme for these.
This can only be used if the emuMMC was created via Nyx. because of the raw_based and file_based files that have emuMMC info.
(emupath=emuMMC/RAW1, emupath=emuMMC/SD00, etc)
Some Sandisk U1 sd cards do not behave nicely if they power cycle too fast. A min 100ms wait, is enough to mitigate that.
Fortunately, because of how the code paths are structured, this was never hit.
Currently bpmp loses access to the relevant registers when secmon or exosphere is launched.
This change provides support for all firmwares and properly sanitizes the display.
