drm/amdgpu: Update amdgpu_job_timedout to check if the ring is guilty

This patch updates the `amdgpu_job_timedout` function to check if
the ring is actually guilty of causing the timeout. If not, it
skips error handling and fence completion.

v2: move the is_guilty check down into the queue reset area (Alex)
v3: need to call is_guilty before reset (Alex)
v4: squash in is_guilty logic fixes (Alex)

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Jesse Zhang <jesse.zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>