[nrf noup] boot/zephyr: nrf54h20dk board support

Added basic support for nrf54h20dk_nrf54h20_cpuapp_iron board.
This commit turns off CONFIG_FPROTECT for this board build.

Signed-off-by: Michal Kozikowski <[email protected]>

Author: nordic-mik7

boot/zephyr/boards/nrf54h20dk_nrf54h20_cpuapp_iron.conf

@@ -0,0 +1,14 @@
+# Copyright (c) 2025 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+# Ensure that the SPI NOR driver is disabled by default
+CONFIG_SPI_NOR=n
+
+# TODO: below are not yet supported and need fixing
+CONFIG_FPROTECT=n
+
+CONFIG_BOOT_WATCHDOG_FEED=n
+
+CONFIG_MULTITHREADING=y