drm/amdgpu/userq: Fix DEBUG_LOCKS_WARN_ON(lock->magic != lock)

Fix DEBUG_LOCKS_WARN_ON(lock->magic != lock) warning logs.

Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>