oniro-openharmony-linux.conf: Prepare use with other distros

This makes it easier to use of meta-openharmony in projects that does not use
oniro-openharmony-linux distro configuration.

Signed-off-by: Esben Haabendal <esben.haabendal@huawei.com>

conf/distro/include/openharmony.inc

+# SPDX-FileCopyrightText: Huawei Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+# OpenHarmony OS version
+OPENHARMONY_VERSION ?= "3.1"
+OPENHARMONY_OVERRIDES = "openharmony-${OPENHARMONY_VERSION}"
+OPENHARMONY_VERSION_FULL = "${OPENHARMONY_VERSION}"
+OPENHARMONY_VERSION_FULL:openharmony-3.1 = "3.1.1"
+
+PREFERRED_VERSION_openharmony-standard = "${OPENHARMONY_VERSION}"

conf/distro/oniro-openharmony-linux.conf

@@ -7,13 +7,8 @@ DISTRO_NAME = "Oniro/OpenHarmony Linux Distro"
 DISTRO_VERSION = "1.99.99"
 
 # OpenHarmony OS version
-OPENHARMONY_VERSION ?= "3.1"
-
-DISTROOVERRIDES:append = ":openharmony-${OPENHARMONY_VERSION}"
-OPENHARMONY_VERSION_FULL = "${OPENHARMONY_VERSION}"
-OPENHARMONY_VERSION_FULL:openharmony-3.1 = "3.1.1"
-
-PREFERRED_VERSION_openharmony-standard = "${OPENHARMONY_VERSION}"
+require include/openharmony.inc
+DISTROOVERRIDES:append = ":${OPENHARMONY_OVERRIDES}"
 
 # LLVM/Clang toolchain
 TOOLCHAIN = "clang"