[llvm] [AMDGPU] Remove FlatVariant argument from isLegalFlatAddressingMode. NFC. (PR #93938)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm commented:

It's not a 1:1 mapping though, you can select global addresses to flat instructions (which the patterns do handle) 

https://github.com/llvm/llvm-project/pull/93938