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/engicam/common/board.c b/board/engicam/common/board.c
index 31ff297..e5358b4 100644
--- a/board/engicam/common/board.c
+++ b/board/engicam/common/board.c
@@ -8,6 +8,7 @@
 #include <common.h>
 #include <command.h>
 #include <env.h>
+#include <init.h>
 #include <mmc.h>
 #include <asm/arch/sys_proto.h>
 #include <watchdog.h>