ilo: update genhw headers

ilo: update genhw headers

Generate these new enums

  enum gen_reorder_mode;
  enum gen_clip_mode;
  enum gen_front_winding;
  enum gen_fill_mode;
  enum gen_cull_mode;
  enum gen_pixel_location;
  enum gen_sample_count;
  enum gen_inputattr_select;
  enum gen_msrast_mode;
  enum gen_prefilter_op;

Correct the type of GEN6_SAMPLER_DW0_BASE_LOD.  Rename gen_logicop_function,
gen_sampler_mip_filter, gen_sampler_map_filter, gen_sampler_aniso_ratio, and
others.