drm/amdgpu: remove DRM_AMDGPU_NAVI3X_USERQ config for UQ

DRM_AMDGPU_NAVI3X_USERQ config support is not required for
usermode queue.

v2: rebase.

Cc: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>
Reviewed-by: Sunil Khatri <sunil.khatri@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Arvind Yadav <Arvind.Yadav@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>