drm/amdgpu: note what type of reset we are using

When we reset the GPU, note what type of reset will be
used.  This makes debugging different reset scenarios
more clear as the driver may use different reset
methods depending on conditions on the system.

Acked-by: Nirmoy Das <nirmoy.das@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>