powerpc: Move cpu specific lmb reserve to arch_lmb_reserve

We've been utilizing board_lmb_reserve to reserve the boot page for MP
systems.  We can just move this into arch_lmb_reserve for 85xx & 86xx
systems rather than duplicating in each board port.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/board/freescale/mpc8572ds/mpc8572ds.c b/board/freescale/mpc8572ds/mpc8572ds.c
index 4b2ef4e..f444805 100644
--- a/board/freescale/mpc8572ds/mpc8572ds.c
+++ b/board/freescale/mpc8572ds/mpc8572ds.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2007-2010 Freescale Semiconductor, Inc.
+ * Copyright 2007-2011 Freescale Semiconductor, Inc.
  *
  * See file CREDITS for list of people who contributed to this
  * project.
@@ -259,12 +259,3 @@
 #endif
 }
 #endif
-
-#ifdef CONFIG_MP
-extern void cpu_mp_lmb_reserve(struct lmb *lmb);
-
-void board_lmb_reserve(struct lmb *lmb)
-{
-	cpu_mp_lmb_reserve(lmb);
-}
-#endif