3DS: Fix GB build
3DS: Fix GB build

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