[clang] [llvm] [RISCV] Inline Assembly Support for GPR Pairs ('Pr') (PR #112983)

[Sam Elliott via cfe-commits]

lenary wrote:

I will rewrite the description of the PR momentarily, once I've rebased over the cleanup/comments to RISCVRegisterinfo.td

https://github.com/llvm/llvm-project/pull/112983