drm/amdgpu/si_dma: remove unused variable in si_dma_stop()

After commit 571c053658 ("drm/amdgpu: switch sdma buffer function
tear down to a helper"), the variable 'ring' is not used anymore, it
can be removed.

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Yang Yingliang 2022-10-12 15:37:07 +08:00 • committed by Alex Deucher
commit 7fe441d8b7