radv: fix computation of the number of user SGPRS for NGG GS state

The NGG GS state uses one user SGPR.

Cc: 21.1 mesa-stable
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10485>

src/amd/vulkan/radv_shader_args.c

@@ -193,6 +193,9 @@ allocate_user_sgprs(struct radv_shader_args *args, gl_shader_stage stage, bool h
       break;
    case MESA_SHADER_GEOMETRY:
       if (has_previous_stage) {
+         if (args->options->key.vs_common_out.as_ngg)
+            user_sgpr_count++; /* NGG GS state */
+
          if (previous_stage == MESA_SHADER_VERTEX) {
             user_sgpr_count += count_vs_user_sgprs(args);
          }