Merge branch 'newgui' of gitlab.com:derrek/fastboot3DS into newgui

arm11: introduce mcu driver, halt leds during startup

ARM11: Timer prescalers start at 1.

Added functions to temporarily disable interrupt handlers on ARM11 without unregistering/reregistering them.

hardware.c --> system.c. Call systemInit() before main().

Optimize(tm) ARM11 IRQ code a bit.

Always keep the power button long pressed state.

Cleanup inline assembly a bit.

Allow poweroff on exceptions/panic.

Revert I2C code change since this can cause deadlocks.

Remove TIMER_sleepMs() in gfx code since the VBlank wait does the same.

Fixed graphics corruption with certain N3DS consoles.

Use const for pre-critical section state.

Fixed the race properly on ARM11.

Do not enable interrupts before initializing all of the hardware (race).

Actually do this right way(tm) episode 2.

Actually do this right.

Fixed more possible problems like the TIMER_sleep() one.

Use a struct to prevent using the wrong reg again.

I dun goofed.

Minor code style stuff.

Turns out ldm/stm can be interrupted.

Actually we don't need strict ABI compliance it seems.

Fixed stack alignment in IRQ handlers.

Use bit shifts instead of harcoded value for initial LCD poweron.

Select first framebuffers on FIRM launch.

Turn on backlight and LCDs at the same time. Correct touchscreen framebuffers on FIRM launch.

Use inline functions when useful.

Temporary workaround for yet another MCU bug.

Nitpicking/code improvements.