fusee: Complete re-write of the hardware initialization code: ...

- Updated code to match hekate's;
- Improved nxboot (now boots firmwares 2.x successfully);
- Temporarily disabled built-in boot system module support;
- Fixed multiple bugs.

Fusee: Deployed new SDMMC driver in fusee-secondary. All stages boot now. ...

Fusee: Fixed wrong argument in se.c function.
Fusee: Improved timers.

fusee: SDMMC driver re-design: ...

- Based on hekate's, linux's and u-boot's source code;
- Full support for SD and MMC;
- Fixes multiple issues;
- Deployed first in fusee-primary.

fusee: Code cleanup and style fixes.

Pass screen status and mmc struct from stage1 to 2

Stage1: fix potential alignment issue

Fix stack overflow when chainloading stage2

[stage1] Add exception handlers... which somehow don't work?

Introduce fatal_error

Add custom panic driver

Rename sd_utils to fs_utils, etc

Refactor stage1's and stage2's main.c files

Make di.c accept arbitrary FB addresses, fix flickering issues

[stage1] Fix DEFAULT_BCT0_FOR_DEBUG

Rewrote crt0, init, and chainloading code ...

start.s, init.c, linker.ld and linker.specs are meant
to be re-used by user applications, should they remove the defines
from init.c and the .chainloader* sections from the linker script

Don't pass the mmc struct around

Instead of passing FatFS structs around, unmount; other changes

Fusee: fix typo

Fusee: Add #define requirement for pragmatic reasons.

Change defaut BCT0 for debug

Merge SD stuff into fusee-secondary. Switch diskio to single-sector reads temporarily

Push minimally working FATFS.

Update argument passing, add video resume

Implement much of the core Stage2 loader logic for Fusee

Add debugging prints, enable backlight for stage1

Implement all core Stage 1 logic for Fusee

Change fusee folder naming