refactors all the ugly "pendingX" atomic operations into a single "Event" subsystem/interface thing with two operations
moves all existing code to use this instead
also changes the "bkpt" macro to also indicate unreachable code
- backlight power control is reinstated but currently buggy, for some reason the __builtin_trap is tripped on GFX_powerOnBacklights and GFX_powerOffBacklights
- also refactored a bunch of other code pertaining to mcu and other hw init, moved the gpu init to a later point since lcd init now depends on mcu events
- properly performs gpu/backlight reset
- nukes vram so the initrd had to be moved to arm9 memory, and have its size (at least temporarily) limited to 256k
- maps a regular ARM-style exception vector table instead of using the bootrom vector redirection
features a ton of bugs because I'm missing something, it actually manages to boot fb3DS v1.2 and BAX fine, but fails to boot itself
- added initial SCU twiddling
- added very untested and unusable SMP code
- fixed race condition that happened on boot
- added initial MMU code (just super basic identity mapping, no caching set up or anything)
- enabled some of the fancier ARMv6 features
- reorganized ARM11 files into their own folders
- possibly more stuff I'm forgetting about
