bsps/irq: bsp_interrupt_facility_initialize()

Do not return a status code in bsp_interrupt_facility_initialize() since this
leads to unreachable code in bsp_interrupt_initialize().  Use RTEMS_DEBUG
assertions in bsp_interrupt_facility_initialize() if necessary.

bsps/powerpc/shared/irq/ppc-irq-generic.c

@@ -151,11 +151,10 @@ rtems_status_code bsp_interrupt_vector_disable(rtems_vector_number vector)
   return RTEMS_SUCCESSFUL;
 }
 
-rtems_status_code bsp_interrupt_facility_initialize(void)
+void bsp_interrupt_facility_initialize(void)
 {
   /*
    * Initialize RTEMS IRQ system
    */
   BSP_rtems_irq_mng_init(0);
-  return RTEMS_SUCCESSFUL;
 }