drm/amdkfd: Avoid queue reset if disabled

If ring reset is disabled, skip resetting queues. Instead, fall back to
device based reset.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>