drm/amdgpu: enable soft reset for gfx 11

Enable soft reset for gfx 11.
V2: enable both gfx v11.0.0 and gfx v11.0.2.

Signed-off-by: Likun Gao <Likun.Gao@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>