Update Strong APA Scheduler

This change allows for the migration of higher priority tasks on the
arrival of a lower priority task limited by affinity constraints.

Change license to BSD-2-Clause according to file history and
re-licensing agreement.

Update #3053.

cpukit/include/rtems/scheduler.h

@@ -251,22 +251,24 @@
 #ifdef CONFIGURE_SCHEDULER_STRONG_APA
   #include <rtems/score/schedulerstrongapa.h>
 
+  #ifndef CONFIGURE_MAXIMUM_PROCESSORS
+    #error "CONFIGURE_MAXIMUM_PROCESSORS must be defined to configure the Strong APA scheduler"
+  #endif
+
   #define SCHEDULER_STRONG_APA_CONTEXT_NAME( name ) \
     SCHEDULER_CONTEXT_NAME( strong_APA_ ## name )
 
   #define RTEMS_SCHEDULER_STRONG_APA( name, prio_count ) \
     static struct { \
       Scheduler_strong_APA_Context Base; \
-      Chain_Control                Ready[ ( prio_count ) ]; \
+      Scheduler_strong_APA_CPU CPU[ CONFIGURE_MAXIMUM_PROCESSORS ]; \
     } SCHEDULER_STRONG_APA_CONTEXT_NAME( name )
 
   #define RTEMS_SCHEDULER_TABLE_STRONG_APA( name, obj_name ) \
     { \
       &SCHEDULER_STRONG_APA_CONTEXT_NAME( name ).Base.Base.Base, \
       SCHEDULER_STRONG_APA_ENTRY_POINTS, \
-      RTEMS_ARRAY_SIZE( \
-        SCHEDULER_STRONG_APA_CONTEXT_NAME( name ).Ready \
-      ) - 1, \
+      SCHEDULER_STRONG_APA_MAXIMUM_PRIORITY, \
       ( obj_name ) \
       SCHEDULER_CONTROL_IS_NON_PREEMPT_MODE_SUPPORTED( false ) \
     }