intel/nir: Call nir_lower_io_to_scalar_early
Shader-db results on Kaby Lake: total instructions in shared programs: 15166953 -> 15073611 (-0.62%) instructions in affected programs: 2390284 -> 2296942 (-3.91%) helped: 16469 HURT: 505 total loops in shared programs: 4954 -> 4951 (-0.06%) loops in affected programs: 3 -> 0 helped: 3 HURT: 0 Reviewed-by:Timothy Arceri <tarceri@itsqueeze.com> Reviewed-by:
Kenneth Graunke <kenneth@whitecape.org>