drm/amdgpu/psp: Destroy psp ring when doing gpu reset

PSP ring need to be destroy before starting reinit for vf.
This patche move it from hypervisor driver into guest.

Signed-off-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Signed-off-by: Frank Min <Frank.Min@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>