pm: device: Dynamically add a device to a power domain

Add API to add devices to a power domain in runtime. The number of
devices that can be added is defined in build time.

The script gen_handles.py will check the number defined in
`CONFIG_PM_DEVICE_POWER_DOMAIN_DYNAMIC` to resize the handles vector,
adding empty slots in the supported sector to be used later.

Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>

CMakeLists.txt

@@ -840,6 +840,12 @@ zephyr_get_include_directories_for_lang(C
   STRIP_PREFIX # Don't use a -I prefix
   )
 
+if(CONFIG_PM_DEVICE_POWER_DOMAIN_DYNAMIC)
+  set(number_of_dynamic_devices ${CONFIG_PM_DEVICE_POWER_DOMAIN_DYNAMIC_NUM})
+else()
+  set(number_of_dynamic_devices 0)
+endif()
+
 if(CONFIG_HAS_DTS)
   # dev_handles.c is generated from ${ZEPHYR_LINK_STAGE_EXECUTABLE} by
   # gen_handles.py
@@ -849,6 +855,7 @@ if(CONFIG_HAS_DTS)
     ${PYTHON_EXECUTABLE}
     ${ZEPHYR_BASE}/scripts/gen_handles.py
     --output-source dev_handles.c
+    --num-dynamic-devices ${number_of_dynamic_devices}
     --kernel $<TARGET_FILE:${ZEPHYR_LINK_STAGE_EXECUTABLE}>
     --zephyr-base ${ZEPHYR_BASE}
     --start-symbol "$<TARGET_PROPERTY:linker,devices_start_symbol>"