Make this branch compatible with pcercuei/gpSP/bios-hle.
Delete CPUFastSet and CPUSet HLE BIOS calls. Reduce storage to 0x2B SWI entries.
mips_stub.S: Instruction reordering optimisations in the assembler code.

* Split the last register load from the others to use as a branch delay slot filler.
* Remove some instructions that were run after 'jr $reg; nop' in memory loads from the GBA address space.
* Added more correct handling of the load delay slot ('lw $reg, MEM; use $reg') by placing a nop in the middle.
* Added a new define, NO_LOAD_DELAY_SLOT, which prevents adding nops on the XBurst architecture and reorders some code that returns from procedure then loads a register.