kmod: Enable xz support by default

Until [1] lands in oe-core kirkstone, we make the change locally in
oniro staging.

[1] https://lists.openembedded.org/g/openembedded-core/message/165420



Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

meta-oniro-staging/recipes-staging/kmod/kmod_%.bbappend

+# SPDX-FileCopyrightText: Huawei Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+PACKAGECONFIG ??= "zlib xz"