drm/amdgpu:fix uvd ring fini routine(v2)

fix missing finish uvd enc_ring.
v2:
since the adev pointer check in already in ring_fini
so drop the check outsider
Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c

@@ -269,6 +269,7 @@ int amdgpu_uvd_sw_init(struct amdgpu_device *adev)
 
 int amdgpu_uvd_sw_fini(struct amdgpu_device *adev)
 {
+	int i;
 	kfree(adev->uvd.saved_bo);
 
 	amd_sched_entity_fini(&adev->uvd.ring.sched, &adev->uvd.entity);
@@ -279,6 +280,9 @@ int amdgpu_uvd_sw_fini(struct amdgpu_device *adev)
 
 	amdgpu_ring_fini(&adev->uvd.ring);
 
+	for (i = 0; i < AMDGPU_MAX_UVD_ENC_RINGS; ++i)
+		amdgpu_ring_fini(&adev->uvd.ring_enc[i]);
+
 	release_firmware(adev->uvd.fw);
 
 	return 0;