[llvm] [AMDGPU][AsmParser]: Use dummy operand for parsing buffer_ SWZ operand. (PR #165305)

[Jeffrey Byrnes via llvm-commits]

jrbyrnes wrote:

I can't get the "CI Checks / Build and Test Linux AArch64" job to pass, but it looks like this bot is just down -- has been faililng for all the recent PRs with the same "The self-hosted runner lost communication with the server". Seems unrelated to this PR.

https://github.com/llvm/llvm-project/pull/165305