lib: stm32wba: ble-802.15.4 integration refactoring

Porting of modes ble, ieee 802.15.4 and concurrent  are refactorised
in one unique RF_Integration folder supporting the 3 different
mode configurations.

Signed-off-by: Vincent Tardy <[email protected]>

Author: vtardy-st

lib/stm32wba/CMakeLists.txt

@@ -136,10 +136,4 @@ if(LL_LIB)
 endif()
 
 add_subdirectory(STM32_WPAN)
-if(CONFIG_BT_STM32WBA AND CONFIG_IEEE802154_STM32WBA)
-  zephyr_include_directories(IEEE802154/Inc)
-  add_subdirectory(concurrent)
-else()
-  add_subdirectory_ifdef(CONFIG_BT_STM32WBA ble)
-  add_subdirectory_ifdef(CONFIG_IEEE802154_STM32WBA IEEE802154)
-endif()
+add_subdirectory(RF_Integration)