Update acl_convolution_utils.cpp

Author: allnes

src/cpu/acl/acl_convolution_utils.cpp

@@ -357,7 +357,7 @@ status_t init_conf_wino(acl_conv_conf_t &acp, memory_desc_t &src_md,
     // clang-format off
     if (one_of(true, one_of(true, src_md.dims[2] < 32,  // ih
                                   src_md.dims[3] < 32)  // iw
-                                  && dnnl_get_max_threads() > 64,
+                                  && dnnl_get_max_threads() > 32,
                      one_of(true, src_md.dims[1] < 64,  // ic
                                   dst_md.dims[1] < 64)) // oc
         && cd.alg_kind == alg_kind::convolution_auto) {