[llvm] [AMDGPU][MC] Add dpp for V_PK_FMAC_F16 for GFX10 (PR #79598)

[Joe Nash via llvm-commits]

https://github.com/Sisyph commented:

Please remove [MC] from the commit title, this affects codegen.

https://github.com/llvm/llvm-project/pull/79598