[llvm] [AMDGPU][True16][CodeGen] enable true16 for more codegen test patch 1 (PR #131206)

[Brox Chen via llvm-commits]

broxigarchen wrote:

> It also fails with a normal build if you just add "-verify-machineinstrs" like `llc -mtriple=amdgcn -mcpu=gfx1100 -mattr=+real-true16 < /repo/uabelho/main-github/llvm/test/CodeGen/AMDGPU/fneg-combines.f16.ll -verify-machineinstrs`

I am looking at this. Thanks for the comments!

https://github.com/llvm/llvm-project/pull/131206