drm/amdgpu: unlock the correct lock in amdgpu_gfx_enable_kcq()

We changed which lock we are supposed to take but this error path
was accidentally over looked so it still drops the old lock.

Fixes: def799c6 ("drm/amdgpu: add multi-xcc support to amdgpu_gfx interfaces (v4)")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -605,7 +605,7 @@ int amdgpu_gfx_enable_kcq(struct amdgpu_device *adev, int xcc_id)
 						kiq->pmf->set_resources_size);
 		if (r) {
 			DRM_ERROR("Failed to lock KIQ (%d).\n", r);
-			spin_unlock(&adev->gfx.kiq[0].ring_lock);
+			spin_unlock(&kiq->ring_lock);
 			return r;
 		}