common: Move pci_init_board() out of common.h

This function can be dropped when all boards use driver model for PCI. For
now, move it into init.h with a comment.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/board/freescale/mpc8349emds/pci.c b/board/freescale/mpc8349emds/pci.c
index 005190e..7615a1d 100644
--- a/board/freescale/mpc8349emds/pci.c
+++ b/board/freescale/mpc8349emds/pci.c
@@ -3,6 +3,7 @@
  * Copyright (C) 2006-2009 Freescale Semiconductor, Inc.
  */
 
+#include <init.h>
 #include <asm/mmu.h>
 #include <asm/io.h>
 #include <common.h>