[llvm] AMDGPU: VALU data fast-forwarding needs no s_delay (PR #205481)

[Jay Foad via llvm-commits]

jayfoad wrote:

See also #198475. (In that PR I tried to do some archaeology to work out what the fast-forward cases were pre-GFX10, but that's irrelevant for this PR because s_delay_alu did not exist until GFX11.)

https://github.com/llvm/llvm-project/pull/205481