[llvm] [AMDGPU] Fix FMA Combine (PR #119217)

[Piotr Sobczak via llvm-commits]

piotrAMD wrote:

I haven't actually checked that, but I _think_ this may be related to https://reviews.llvm.org/D142507 that split out dot10-insts out of dot7-insts.

https://github.com/llvm/llvm-project/pull/119217