GBA Context: Fix minimal core configuration
GBA Context: Fix minimal core configuration

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