[nrf fromtree] soc: nordic: nrf71: uicr: Fix hex_file override from main image

Move set_target_properties for runners_yaml_props_target below
board.cmake include so that UICR image always flashes its own
output regardless of the main image configuration.

When the main image targets cpuapp/ns (TF-M), import_kconfig()
pulls CONFIG_TFM_FLASH_MERGED_BINARY into the UICR image's CMake
scope. This causes board.cmake to override hex_file with
tfm_merged.hex, which does not exist in the UICR utility image,
resulting in a flash failure.

Signed-off-by: Dhanoo Surasarang <dhanoo.surasarang@nordicsemi.no>
(cherry picked from commit 16fe56e)

Author: dhsu-nordic

soc/nordic/nrf71/uicr/gen_uicr/CMakeLists.txt

@@ -41,9 +41,6 @@ add_custom_target(gen_uicr ALL DEPENDS ${uicr_hex})
 
 # Create the runners_yaml_props_target that flash system expects
 add_custom_target(runners_yaml_props_target)
-set_target_properties(runners_yaml_props_target PROPERTIES
-  hex_file "zephyr.hex"
-)
 
 # Copy over Kconfig and dts files from the main image
 get_filename_component(default_image_binary_dir ${DEFAULT_IMAGE_EDT_PICKLE} DIRECTORY)
@@ -60,6 +57,11 @@ foreach(dir ${BOARD_DIRECTORIES})
   include(${dir}/board.cmake OPTIONAL)
 endforeach()
 
+# Override hex_file after board.cmake to ensure it always flash its own output
+set_target_properties(runners_yaml_props_target PROPERTIES
+  hex_file "zephyr.hex"
+)
+
 # Include flash support to automatically generate runners.yaml
 include(${ZEPHYR_BASE}/cmake/flash/CMakeLists.txt)