i965: use gl_shader_program_data::spirv

Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

src/mesa/drivers/dri/i965/brw_program.c

@@ -77,7 +77,7 @@ brw_create_nir(struct brw_context *brw,
 
    /* First, lower the GLSL/Mesa IR or SPIR-V to NIR */
    if (shader_prog) {
-      if (shader_prog->_LinkedShaders[stage]->spirv_data)
+      if (shader_prog->data->spirv)
          nir = _mesa_spirv_to_nir(ctx, shader_prog, stage, options);
       else
          nir = glsl_to_nir(shader_prog, stage, options);