86xx: Support new law setup method and convert mpc8641

Adds the support code in cpu/mpc86xx for the new law setup code
recently created fsl_law.c, and changes the MPC8641HPCN config
to use this code.

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
diff --git a/cpu/mpc86xx/cpu_init.c b/cpu/mpc86xx/cpu_init.c
index 4f8956e..ab5906d 100644
--- a/cpu/mpc86xx/cpu_init.c
+++ b/cpu/mpc86xx/cpu_init.c
@@ -49,6 +49,10 @@
 	/* Clear initial global data */
 	memset ((void *) gd, 0, sizeof (gd_t));
 
+#ifdef CONFIG_FSL_LAW
+	init_laws();
+#endif
+
 	/* Map banks 0 and 1 to the FLASH banks 0 and 1 at preliminary
 	 * addresses - these have to be modified later when FLASH size
 	 * has been determined
@@ -114,5 +118,8 @@
  */
 int cpu_init_r(void)
 {
+#ifdef CONFIG_FSL_LAW
+	disable_law(0);
+#endif
 	return 0;
 }