[llvm] [SPARC] Remove CCIfConsecutiveRegs for f128 returns (PR #170133)

[Rainer Orth via llvm-commits]

rorth wrote:

> Okay, reworked the PR, it should fix the remaining SIGILL issues in 2-stage builds.

It does indeed, thanks a lot.  I'll wait until this PR has been committed, than replace the `clang-22` on the bot with the fixed on, which should get it green again.

https://github.com/llvm/llvm-project/pull/170133