common: Move some board functions out of common.h

A number of board function belong in init.h with the others. Move them.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/board/freescale/mx31pdk/mx31pdk.c b/board/freescale/mx31pdk/mx31pdk.c
index b31a97b..fb57f26 100644
--- a/board/freescale/mx31pdk/mx31pdk.c
+++ b/board/freescale/mx31pdk/mx31pdk.c
@@ -8,6 +8,7 @@
 
 
 #include <common.h>
+#include <init.h>
 #include <netdev.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/imx-regs.h>