[llvm] [AMDGPU][MC] Fixed an issue where VOPD instruction doesn't accept a relocatable symbol (PR #226755)

[Robert Imschweiler via llvm-commits]

https://github.com/ro-i approved this pull request.

not really an expert on the ASMParser, but would give that a humble approve :)

https://github.com/llvm/llvm-project/pull/226755