sysbuild: integrate nrf into sysbuild as a Zephyr sysbuild module

Add `sysbuild-cmake` and `sysbuild-kconfig` to zephyr/module.yml to
source those files from the sysbuild build infrastructure.

Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>

Author: tejlmand

CODEOWNERS

@@ -43,6 +43,9 @@
 /CMakeLists.txt                           @tejlmand
 # All Kconfig related files
 Kconfig*                                  @tejlmand
+# Sysbuild related files
+/sysbuild/                                @tejlmand @nordicjm
+/cmake/sysbuild/                          @tejlmand @nordicjm
 # All doc related files
 /doc/_extensions/                         @gmarull
 /doc/_scripts/                            @carlescufi

sysbuild/CMakeLists.txt

@@ -0,0 +1,5 @@
+#
+# Copyright (c) 2023 Nordic Semiconductor
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#

sysbuild/Kconfig.sysbuild

@@ -0,0 +1,7 @@
+#
+# Copyright (c) 2022 Nordic Semiconductor
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+# This file contains extra images which can be used with sysbuild based builds.

zephyr/module.yml

@@ -1,6 +1,8 @@
 build:
   cmake: .
   kconfig: Kconfig.nrf
+  sysbuild-cmake: sysbuild
+  sysbuild-kconfig: sysbuild/Kconfig.sysbuild
   settings:
     board_root: .
     dts_root: .