[llvm] [Hexagon] Enable Machine Combiner pass. (PR #169434)

[Brian Cain via llvm-commits]

androm3da wrote:

> This patch will reduce some downstream delta and will be a crucial piece in some of the optimizations

Is this pass on by default in ~typical optimization levels like -O1/-O2?  If so, can you run the llvm-test-suite to check for regressions?

https://github.com/llvm/llvm-project/pull/169434