drm/amdgpu: implement gmc_v7_0_emit_flush_gpu_tlb

Unify tlb flushing for gmc v7.

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
4 files changed