fusee: fix drive strength and avoid a pad wear-condition

fusee: merge in most of the microSD card (not fully working)

fusee: implement partition support; needs some tweeks

fusee: sdmmc: use v3 compatibility mode for it's simpler DMA ...

we may want to change this at some point to get 64-bit addressing?

fusee: sdmmc: support CPU reads in addition to (broken?) DMA

fusee: sdmmc: handle DMA page boundaries

sdmmc: mostly working for eMMC, now

fusee: get non-data SDMMC commands fully working on eMMC

fusee: further flesh out sdmmc implementation

fusee: fix issue with SDMMC psuedo-interrupts

fusee: add missing file

skeleton SDMMC

Fix small issues in the stage2 loader (#78) ...

* stage2 loader: Fix loadlist parsing breaking out of the loop too early

* stage2 loader: Use bct0 from the loader context

Change read_sd_file semantics to return size read.

Fusee: Fix BisPartition enum to correctly identify partitions. ...

* BisPartition_t was missing SAFE, meaning User and System were using wrong key_source

* Normalize tabs to spaces

* Merge User and System BisPartition_t because they are the same key anyway

* Remove extra newline

fusee: fix missing volatiles in memory utils

fusee: update header names for starting cpu0

Fusee: Fix overflow condition in SD KIP merging

Fusee: Update INI1 size after patching

Fusee: Actually write SD path in stratosphere_merge_inis

Stratosphere: Add support for custom KIPs/INI in Fusee

Fusee Stage 2: Flesh out Package2 patching (implement decryption, fixing of metadata)

Skeleton out framework for patching package2.

Fusee Stage2: skeleton more of the nxboot process

Add skeleton architecture for displaying custom splash screen

Restore incorrectly deleted files

Fusee Stage 2: Make references to external (stage 1) memory internal.

Fusee stage 2: Fix up loader (no stage 3!). Skeleton chainload behavior.

Remove stage3 refs from Makefile

Turns out we actually don't need a third stage for Fusee