Actually don't use memcpy in sdmmc

Sync sdmmc changes between stage1 and 2

Use memcpy instead of raw casts in sdmmc.c

Revamp all the Makefiles (thanks @fincs @WinterMute) ...

... dependencies are now properly handled (e.g. header changes, etc.)

fusee sdmmc: don't time out on long reads

Exosphere: Fix remaining crt0 bugs, we now make it to pk2ldr.

Exosphere: Fix bug, we now make it past MMU enable.

Exosphere: Copy initial data image to DRAM for coldboot init.

Exosphere: Fix relocation bug (warmboot relocs currently broken in edge case)

[stage2] Add more debugging printfs to package2.c, etc.

Fix nxboot mkey rev misconception

Refactor nxboot package2 reading, work around sdmmc issue, other changes

[stage2] Fix some FS bugs

[exosphere] Fix bug in package2.c

Fix bug in fusee: package2.c, etc.

Fusee: Change package2 loading logic (untested)

Fusee: fix unused var

Fusee: Implement BIS crypto functions.

Fix out-of-bounds partition r/w bugs in raw_dev.c

GPT entry LBA range is inclusive

Fix latest commit

Fix BCT version parsing

Don't overflow devoptabs, etc.

Load the appropriate package1 key. The warmboot fw is now properly read.

Fix key derivation regression

[stage2] Add "hexdump"

Align crypto buffers to 16 bytes in key_derivation.c

Simplify some logic in derive_nx_keydata

Fix typo in decrypting all keyblobs (thanks @tslater2006 !)

Fusee: Fix typo when decrypting keyblobs.