smp: Rely on BSS initialization

The _Per_CPU_Information is part of the BSS segment and must be zero
initialized.  Some processors may already poll some per-CPU fields and
wait for a state change at this point.

cpukit/score/src/percpu.c

@@ -35,11 +35,6 @@
     size_t      size;
     uintptr_t   ptr;
 
-    /*
-     *  Initialize per CPU structures.
-     */
-    size = (_SMP_Processor_count) * sizeof(Per_CPU_Control);
-    memset( _Per_CPU_Information, '\0', size );
 
     /*
      *  Initialize per cpu pointer table