[llvm] AMDGPU: Define HasExpOrExportInsts for export instruction definitions. (PR #84083)

[Jay Foad via llvm-commits]

https://github.com/jayfoad commented:

Please let's just call it `HasExportInsts`. "exp" is just short for "export" so the longer name doesn't add any meaning.

https://github.com/llvm/llvm-project/pull/84083