zephyr-demo-smarthome-sensors: Introduce sensors board image

Demo consists of two IOT endpoints: sensors board
and bulb/LED board.
Add image to specialize base settings to the sensors board's
configuration. In this case LED control is disabled.

Signed-off-by: Zbigniew Bodek <zbigniew.bodek@huawei.com>

meta-ohos-demo/recipes-kernel/zephyr-kernel/zephyr-demo-smarthome-sensors.bb

+# SPDX-FileCopyrightText: Huawei Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+require zephyr-demo-smarthome-base.bb
+
+SUMMARY = "SmartHome demo image: sensors"
+DESCRIPTION = "Zephyr based image targeting sensors board"
+LICENSE = "Apache-2.0"
+
+# Comment out features not used by this image
+do_configure_append() {
+	sed -i '/^CONFIG_GROVE_LED_CTRL/ s/./#&/' ${ZEPHYR_SRC_DIR}/prj.conf
+}