bsps: Move tictac.c to bsps

This patch is a part of the BSP source reorganization.

Update #3285.

bsps/powerpc/shared/start/tictac.c

@@ -0,0 +1,32 @@
+/**
+ * @file
+ *
+ * @ingroup powerpc_shared
+ *
+ * @brief Source file for tic-tac code.
+ */
+
+/*
+ * Copyright (c) 2008
+ * Embedded Brains GmbH
+ * Obere Lagerstr. 30
+ * D-82178 Puchheim
+ * Germany
+ * rtems@embedded-brains.de
+ *
+ * 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 <stdint.h>
+
+/**
+ * @brief Referenc value for tac().
+ */
+uint32_t ppc_tic_tac = 0;
+
+/**
+ * @brief Referenc value for bam().
+ */
+uint32_t ppc_boom_bam = 0;