Since kitty offloads the rendering to the GPU, it doesn't make much sense to run it without hardware acceleration. Spotted while fixing the build on macppc. Thanks to Brad for proposing to use ONLY_FOR_ARCHS instead of not building the port on macppc only. Aarch64 has been added since it supports amdgpu(4) and radeondrm(4). OK thfr@ (maintainer, on my first proposal)