intel/vec4: Silence unused paramter warnings in brw_vec4_generator.cpp

intel/vec4: Silence unused paramter warnings in brw_vec4_generator.cpp

src/intel/compiler/brw_vec4_generator.cpp: In function ‘void generate_gs_svb_write(brw_codegen*, brw_vue_prog_data*, brw::vec4_instruction*, brw_reg, brw_reg, brw_reg)’:
src/intel/compiler/brw_vec4_generator.cpp:488:49: warning: unused parameter ‘prog_data’ [-Wunused-parameter]
  488 |                       struct brw_vue_prog_data *prog_data,
      |                       ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~
src/intel/compiler/brw_vec4_generator.cpp: In function ‘void generate_pull_constant_load(brw_codegen*, brw_vue_prog_data*, brw::vec4_instruction*, brw_reg, brw_reg, brw_reg)’:
src/intel/compiler/brw_vec4_generator.cpp:1269:55: warning: unused parameter ‘prog_data’ [-Wunused-parameter]
 1269 |                             struct brw_vue_prog_data *prog_data,
      |                             ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~
src/intel/compiler/brw_vec4_generator.cpp: In function ‘void generate_get_buffer_size(brw_codegen*, brw_vue_prog_data*, brw::vec4_instruction*, brw_reg, brw_reg, brw_reg)’:
src/intel/compiler/brw_vec4_generator.cpp:1331:52: warning: unused parameter ‘prog_data’ [-Wunused-parameter]
 1331 |                          struct brw_vue_prog_data *prog_data,
      |                          ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~
src/intel/compiler/brw_vec4_generator.cpp: In function ‘void generate_pull_constant_load_gen7(brw_codegen*, brw_vue_prog_data*, brw::vec4_instruction*, brw_reg, brw_reg, brw_reg)’:
src/intel/compiler/brw_vec4_generator.cpp:1357:60: warning: unused parameter ‘prog_data’ [-Wunused-parameter]
 1357 |                                  struct brw_vue_prog_data *prog_data,
      |                                  ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6826>