soc: silabs: siwx91x: Use runner props to select file to flash

Use runners_yaml_props_target to set the name of the file to
flash, rather than hard-coding it for each board.

Co-developed-by: Aksel Skauge Mellbye <aksel.mellbye@silabs.com>
Signed-off-by: Aksel Skauge Mellbye <aksel.mellbye@silabs.com>
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>

boards/silabs/radio_boards/siwx917_rb4338a/board.cmake

@@ -1,8 +1,7 @@
 # Copyright (c) 2024 Silicon Laboratories Inc.
 # SPDX-License-Identifier: Apache-2.0
 
-board_runner_args(silabs_commander "--device=SiWG917M111GTBA" "--file-type=bin"
+board_runner_args(silabs_commander "--device=SiWG917M111GTBA")
-    "--file=${PROJECT_BINARY_DIR}/${KERNEL_BIN_NAME}.rps")
 include(${ZEPHYR_BASE}/boards/common/silabs_commander.board.cmake)
 
 # It is not possible to load/flash a firmware using JLink, but it is possible to

boards/silabs/radio_boards/siwx917_rb4342a/board.cmake

@@ -1,8 +1,7 @@
 # Copyright (c) 2025 Silicon Laboratories Inc.
 # SPDX-License-Identifier: Apache-2.0
 
-board_runner_args(silabs_commander "--device=SiWG917M111GTBA" "--file-type=bin"
+board_runner_args(silabs_commander "--device=SiWG917M111GTBA")
-    "--file=${PROJECT_BINARY_DIR}/${KERNEL_BIN_NAME}.rps")
 include(${ZEPHYR_BASE}/boards/common/silabs_commander.board.cmake)
 
 # It is not possible to load/flash a firmware using JLink, but it is possible to

soc/silabs/silabs_siwx91x/CMakeLists.txt

@@ -12,3 +12,5 @@ set_property(GLOBAL APPEND PROPERTY extra_post_build_commands
     ${KERNEL_BIN_NAME}
     ${KERNEL_BIN_NAME}.rps
 )
+# runners_yaml_props_target controls the file used by "west flash"
+set_target_properties(runners_yaml_props_target PROPERTIES bin_file ${PROJECT_BINARY_DIR}/${KERNEL_BIN_NAME}.rps)