[llvm] [X86] LowerSelect - use BLENDV for scalar selection if not all operands are multi use (PR #125853)

[Simon Pilgrim via llvm-commits]

RKSimon wrote:

Changes to sse-minmax.ll - Ill push the diff (tmp commit for review - I'll remove it again later)

https://github.com/llvm/llvm-project/pull/125853