[llvm] [X86][MC] Support Intel FRED and LKGS instructions. (PR #91909)

[Freddy Ye via llvm-commits]

FreddyLeaf wrote:

> ` [4336dec](/llvm/llvm-project/pull/91909/commits/4336dec6b427e7abe955845e2d84e49362f4be53)`

Good catch, found them in section A.2 and A.3. addressed in 
4336dec

https://github.com/llvm/llvm-project/pull/91909