Issue with ARM7 define in GBA cmake and libfat

[Lorenzooone]

Here the cmake defines ARM7 for the GBA cmake:

pacman-packages/cmake/gba/NintendoGBA.cmake

Line 16 in 013a757

set(GBA_COMMON_FLAGS "-ffunction-sections -fdata-sections -D__GBA__ -DARM7")

However, libfat checks for ARM7 to define NDS in its header, which then causes issues when its tries to include ds-specific files here:
https://github.com/devkitPro/libfat/blob/154f7829d43421754085877d533d66743d42619a/include/fat.h#L43

[endrift]

I filed devkitPro/libfat#25 to take care of it in libfat instead of the cmake toolchains.

[Lorenzooone]

Okay, sounds good.
I was kind of worried that this define could have problematic interactions with other libraries as well. But if that is not the case, changing libfat only should suffice.

Closing the issue for now. Thanks!