feat: configurable board pwm freq from Kconfig (#24787)

* feat: configurable board pwm freq from Kconfig

* feat: add board_pwm_config to submenu

* fix: define sequence correction

* fix: revert Tools/simulation/gz

* fix: track upstream gz

* fix: track upstream mavlink

* feat: adjustable pwm for multiple board types

* feat: add conditional check for CONFIG_ for correct fallback

* add: spacecraft board with correct BOARD_PWM_FREQ supporting 10Hz actuation rate

* fix: set dependencies for submenu arch chips

* fix: keep only upper arch level

* fix: proper checking - still not showing up for board config

* feat: add hidden kconfig for platforms

* Merge Nuttx config into px4board

Allows to expose nuttx into PX4 if needed

* Kconfig: Include nuttx symbols in updateconfig

Only if applicable i.e. defined in the kconfig

* fix: merged config with previously generated boardconfig

* doc: updated code comment

---------

Co-authored-by: Daniel Agar <daniel@agar.ca>
Co-authored-by: Peter van der Perk <peter.vanderperk@nxp.com>

platforms/nuttx/cmake/init.cmake

@@ -108,3 +108,11 @@ foreach(NameAndValue ${ConfigContents})
 		set(${Name} ${Value} CACHE INTERNAL "NUTTX DEFCONFIG: ${Name}" FORCE)
 	endif()
 endforeach()
+
+# Add CONFIG_ARCH_CHIP to boardconfig by merging
+execute_process(
+	COMMAND ${CMAKE_COMMAND} -E env ${COMMON_KCONFIG_ENV_SETTINGS}
+	${PYTHON_EXECUTABLE} ${PX4_SOURCE_DIR}/Tools/kconfig/merge_config.py Kconfig ${BOARD_CONFIG} ${BOARD_CONFIG} ${PX4_BINARY_DIR}/NuttX/nuttx/.config
+	WORKING_DIRECTORY ${PX4_SOURCE_DIR}
+	OUTPUT_VARIABLE DUMMY_RESULTS
+)