GBA Video: Fix palette deserialization on big endian
GBA Video: Fix palette deserialization on big endian

Anty-Lemon/mgba,Iniquitatis/mgba,sergiobenrocha2/mgba,Anty-Lemon/mgba,mgba-emu/mgba,mgba-emu/mgba,libretro/mgba,sergiobenrocha2/mgba,mgba-emu/mgba,iracigt/mgba,sergiobenrocha2/mgba,iracigt/mgba,fr500/mgba,Iniquitatis/mgba,iracigt/mgba,jeremyherbert/mgba,sergiobenrocha2/mgba,Iniquitatis/mgba,jeremyherbert/mgba,libretro/mgba,Iniquitatis/mgba,libretro/mgba,Anty-Lemon/mgba,jeremyherbert/mgba,fr500/mgba,libretro/mgba,libretro/mgba,jeremyherbert/mgba,mgba-emu/mgba,Anty-Lemon/mgba,iracigt/mgba,sergiobenrocha2/mgba,fr500/mgba,fr500/mgba