adds hooks in bootup do move smp booting into the smp port lib

port/threadx/CMakeLists.txt

@@ -1,5 +1,5 @@
-
-if(NOT DEFINED THREADX_LOW_LEVEL_INIT_SOURCE) #required for tests to hook into the ISR path
+#required for tests to hook into the ISR path
+if(NOT DEFINED THREADX_LOW_LEVEL_INIT_SOURCE)
     set(THREADX_LOW_LEVEL_INIT_SOURCE
         ${CMAKE_CURRENT_LIST_DIR}/src/tx_initialize_low_level.c)
 endif()