samples: smp_svr: default key provisioning for KMU

Generation of default keyfile for provisioning when KMU is enabled.

Signed-off-by: Krzysztof Szromek <[email protected]>

Author: kszromek-nordic

samples/zephyr/subsys/mgmt/mcumgr/smp_svr/Kconfig.sysbuild

@@ -0,0 +1,17 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+if SOC_SERIES_NRF54LX
+
+config MCUBOOT_GENERATE_DEFAULT_KMU_KEYFILE
+	default y if BOOTLOADER_MCUBOOT && MCUBOOT_SIGNATURE_USING_KMU
+
+config SECURE_BOOT_GENERATE_DEFAULT_KMU_KEYFILE
+	default y if SECURE_BOOT_APPCORE
+
+endif
+
+source "$(ZEPHYR_BASE)/share/sysbuild/Kconfig"