[llvm] [BPF] Support signed division at cpu v1 with constant divisor (PR #110627)

[via llvm-commits]

yonghong-song wrote:

Okay, I will treat signed and unsigned div the same for BPF. This way, all non-BPF codes will be removed. Will close this one and create another pull request.

https://github.com/llvm/llvm-project/pull/110627