drm/amdgpu/sdma4.4.2: implement ring reset callback for sdma4.4.2

drm/amdgpu/sdma4.4.2: implement ring reset callback for sdma4.4.2

Implement sdma queue reset callback via SMU interface.

v2: Leverage inst_stop/start functions in reset sequence.
    Use GET_INST for physical SDMA instance.
    Disable apu for sdma reset.
v3: Rephrase error prints.
v4: Remove redundant prints. Remove setting PREEMPT registers as
    soft reset handles it.

Signed-off-by: Jiadong Zhu <Jiadong.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>