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/beckhoff/mx53cx9020/mx53cx9020.c b/board/beckhoff/mx53cx9020/mx53cx9020.c
index 1b1b688..63a54f5 100644
--- a/board/beckhoff/mx53cx9020/mx53cx9020.c
+++ b/board/beckhoff/mx53cx9020/mx53cx9020.c
@@ -9,6 +9,7 @@
 
 #include <common.h>
 #include <cpu_func.h>
+#include <init.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/iomux-mx53.h>