radeonsi: prevent a gfx10_ngg_calculate_subgroup_info failure for TES+NGG GS
arb_tessellation_shader-tes-gs-max-output -small -scan 1 50 -auto -fbo doesn't pass, but at least all shaders are compiled successfully.
arb_tessellation_shader-tes-gs-max-output -small -scan 1 50 -auto -fbo doesn't pass, but at least all shaders are compiled successfully.