intel/compiler: Silence unused parameter warning in brw_interpolation_map.c

The parameter is never used, and it's not part of a common interface
idiom.  Remove it.

src/intel/compiler/brw_interpolation_map.c: In function ‘brw_setup_vue_interpolation’:
src/intel/compiler/brw_interpolation_map.c:62:59: warning: unused parameter ‘devinfo’ [-Wunused-parameter]
                             const struct gen_device_info *devinfo)
                                                           ^~~~~~~

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/intel/compiler/brw_compiler.h

@@ -993,8 +993,7 @@ void brw_compute_tess_vue_map(struct brw_vue_map *const vue_map,
 /* brw_interpolation_map.c */
 void brw_setup_vue_interpolation(struct brw_vue_map *vue_map,
                                  struct nir_shader *nir,
-                                 struct brw_wm_prog_data *prog_data,
-                                 const struct gen_device_info *devinfo);
+                                 struct brw_wm_prog_data *prog_data);
 
 enum shader_dispatch_mode {
    DISPATCH_MODE_4X1_SINGLE = 0,

src/intel/compiler/brw_fs.cpp

@@ -7758,9 +7758,8 @@ brw_compile_fs(const struct brw_compiler *compiler, void *log_data,
    brw_nir_lower_fs_inputs(shader, devinfo, key);
    brw_nir_lower_fs_outputs(shader);
 
-   if (devinfo->gen < 6) {
-      brw_setup_vue_interpolation(vue_map, shader, prog_data, devinfo);
-   }
+   if (devinfo->gen < 6)
+      brw_setup_vue_interpolation(vue_map, shader, prog_data);
 
    if (!key->multisample_fbo)
       NIR_PASS_V(shader, demote_sample_qualifiers);

src/intel/compiler/brw_interpolation_map.c

@@ -58,8 +58,7 @@ gen4_frag_prog_set_interp_modes(struct brw_wm_prog_data *prog_data,
 /* Set up interpolation modes for every element in the VUE */
 void
 brw_setup_vue_interpolation(struct brw_vue_map *vue_map, nir_shader *nir,
-                            struct brw_wm_prog_data *prog_data,
-                            const struct gen_device_info *devinfo)
+                            struct brw_wm_prog_data *prog_data)
 {
    /* Initialise interp_mode. INTERP_MODE_NONE == 0 */
    memset(prog_data->interp_mode, 0, sizeof(prog_data->interp_mode));