[ARM11] Allow setting IRQ handlers to NULL like on ARM9 + cleanup.

General cleanup + possible I2C bugfix.

Move more I2C stuff to mcu.c/h.

Use I2C IRQs. I2C code cleanup + other changes required after the former.

Typo fixes/consistency.

[ARM9] Cache code optimizations.

[ARM11] Cache code optimizations.

Don't enable the FCRAM extension if already done. Fixes fastboot chainloading itself.

HASH engine support for ARM11.

Actually make the previous commit work.

Enable N3DS FCRAM extension if available.

Consistency.

More mmu.c improvements. Added mmuMapSupersections().

Forgot 1 define in the previous commit.

Cleanup in mmu.c.

Properly separate text/rodata/data on ARM11. Increases FIRM size by a few KiB.

Reenable full GPU/LCD deinit + cleanup.

Introducing cfg9.h and cfg11.h.

Make core 1/2/3 init optional.

Clear screens on screen init only if requested.

Added proper core 2/3 poweroff code.

Cleanup core 2/3 code.

Added function for changing CPU clock.

Implemented core 2/3 init for New 3DS. Also enables FCRAM extension. This is currently disabled.

Fixed New 3DS specific graphics corruption on screen init.

Avoid some instruction stalls because i have nothing better to do(tm).

Revert GFX init code order because the new one may cause issues with a few consoles.

Move more inline asm to arm.h.

Move most inline asm to arm.h.

Introducing arm.h.