Refactor VUNARY microkernel parameters

- Move mask_table into AVX microkernel parameters to unblock amalgamation

PiperOrigin-RevId: 419115513
diff --git a/src/xnnpack/operator.h b/src/xnnpack/operator.h
index b37bd03..9f7740f 100644
--- a/src/xnnpack/operator.h
+++ b/src/xnnpack/operator.h
@@ -284,6 +284,7 @@
     union xnn_f16_f32_cvt_params f16_f32_cvt;
     struct xnn_f16_hswish_params f16_hswish;
     union xnn_f32_abs_params f32_abs;
+    union xnn_f32_default_params f32_default;
     union xnn_f32_elu_params f32_elu;
     union xnn_f32_lrelu_params f32_lrelu;
     union xnn_f32_neg_params f32_neg;