JIT: fix fsel/ps_sel implementations for NaN input

fselx was the main problem, but ps_sel was wrong too (even if there were no
known reported bugs with it).

This fixes Beyond Good and Evil (at the least).
Merge pull request #1121 from FioraAeterna/fixfsel

JIT: fix fsel/ps_sel implementations for NaN input
VideoCommon: Make zfreeze in GenMode 1 bit in size
VideoCommon: Fix function casing in FrameBufferManagerBase
Merge pull request #1128 from lioncash/bits

VideoCommon: Make zfreeze in GenMode 1 bit in size
Merge pull request #1129 from lioncash/casing

VideoCommon: Fix function casing in FrameBufferManagerBase
ChunkFile: Add a DoArray overload which takes an std::array.

This is inconsistent with how other containers are used (i.e. with Do()), but making std::array be used with Do() seems rather confusing when there's also a DoArray available.
GPU: Only load the relevant color components upon writes to the tev color registers.

The other two components need not be valid upon write, hence loading them results in glitches.

Fixes issue 6783.
Merge pull request #1102 from neobrain/tevreg_loading

GPU: Only load the relevant color components upon writes to the tev color registers
Disassembler: fix disassembly of some twi instructions
Merge pull request #1135 from FioraAeterna/twidisasmfix

Disassembler: fix disassembly of some twi instructions