bsps: Move bspsmpgetcurrentprocessor.c to bsps

This patch is a part of the BSP source reorganization.

Update #3285.

bsps/shared/start/getcurrentprocessor-zero.c

@@ -0,0 +1,15 @@
+/*
+ *  COPYRIGHT (c) 1989-2011.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+
+#include <rtems/score/cpu.h>
+
+uint32_t _CPU_SMP_Get_current_processor( void )
+{
+  return 0;
+}