Refactor fusee's makefile

Fix mmc->allow_voltage_switching assignment in sdmmc_init

Copy latest sdmmc driver to stage2

Add debug comment for exosphère

Unstub "Validate section hashes."

Fusee: Fix se_calculate_sha256

Use uintX_t for the SE & copy bugfixed SE struct definition

Stage2: Fix bug, add more debug printfs to nxboot. The CCPLEX doesn't turn on

Stage2: fix various bugs in package2.c

Fix bug in stratosphere_get_ini1, etc.

stage2: package2: bypass hash checks for now

Stage2: Add exception handlers

Fusee use CAR reboot for fatal errors

Remove packed when not needed

Don't check for panics in stage2

wtf pmc reboot doesn't fully work -- display doesn't reinitialize

Introduce fatal_error

Add custom panic driver

Make struct tegra_pmc not packed

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.)

[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

Fix bug in fusee: package2.c, etc.

Fusee: Change package2 loading logic (untested)

Fusee: fix unused var