There is an updated pull request by egorenar against master on the void-packages repository

https://github.com/egorenar/void-packages linux-5.7-enable-btf-x86_64
https://github.com/void-linux/void-packages/pull/23534

linux5.7: enable BPF type format on x86_64
Required e.g. for opensnoop from bcc-tools to fix the following problem:
libbpf: failed to find valid kernel BTF
libbpf: vmlinux BTF is not found
bpf: Failed to load program: Invalid argument

A patch file from https://github.com/void-linux/void-packages/pull/23534.patch is attached