zink: flag all shaders for create during gfx program init

now we can avoid needing extra conditionals in the update hotpath

Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11740>

src/gallium/drivers/zink/zink_program.c

@@ -430,6 +430,8 @@ zink_create_gfx_program(struct zink_context *ctx,
       if (stages[i] || prog->shaders[i])
          _mesa_hash_table_init(&prog->base.shader_cache[i], prog, keybox_hash, keybox_equals);
       prog->shaders[i] = stages[i];
+      /* always force shader creation during init */
+      ctx->dirty_shader_stages |= BITFIELD_BIT(i);
    }
    if (stages[PIPE_SHADER_TESS_EVAL] && !stages[PIPE_SHADER_TESS_CTRL]) {
       prog->shaders[PIPE_SHADER_TESS_EVAL]->generated =