[AMDGPU] Enable ds_min/ds_max on more subtargets

Adds patterns for f64 ds_min/ds_max. Shrinks HasLDSFPAtomics
scope to enable f32.

Reviewed By: rampitec

Differential Revision: https://reviews.llvm.org/D108994

Change-Id: Id890b677841ee588b20d42b1bb3f4cdbf6e9ba1a