smp: Move secondary CPU initialization request

Do not assume that the scheduler selects the main processor for the
initialization thread.

cpukit/sapi/src/exinit.c

@@ -223,6 +223,10 @@ void rtems_initialize_start_multitasking(void)
 
   _System_state_Set( SYSTEM_STATE_BEGIN_MULTITASKING );
 
+#ifdef RTEMS_SMP
+  _SMP_Request_other_cores_to_perform_first_context_switch();
+#endif
+
   _Thread_Start_multitasking();
 
   /*******************************************************************

cpukit/score/src/threadhandler.c

@@ -126,12 +126,6 @@ void _Thread_Handler( void )
      */
     if (doCons) /* && (volatile void *)_init) */ {
       INIT_NAME ();
-   
-      #if defined(RTEMS_SMP)
-        _Thread_Disable_dispatch();
-          _SMP_Request_other_cores_to_perform_first_context_switch();
-        _Thread_Enable_dispatch();
-      #endif
     }
  #endif