GB MBC: Fix swapping carts not detect new MBC
GB MBC: Fix swapping carts not detect new MBC

libretro/mgba,fr500/mgba,Iniquitatis/mgba,fr500/mgba,mgba-emu/mgba,fr500/mgba,mgba-emu/mgba,Anty-Lemon/mgba,libretro/mgba,libretro/mgba,Iniquitatis/mgba,Iniquitatis/mgba,Anty-Lemon/mgba,Anty-Lemon/mgba,fr500/mgba,Anty-Lemon/mgba,mgba-emu/mgba,libretro/mgba,mgba-emu/mgba,libretro/mgba,Iniquitatis/mgba