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/intel/edison/edison.c b/board/intel/edison/edison.c
index f56b5b1..652f975 100644
--- a/board/intel/edison/edison.c
+++ b/board/intel/edison/edison.c
@@ -5,6 +5,7 @@
 #include <common.h>
 #include <dwc3-uboot.h>
 #include <env.h>
+#include <init.h>
 #include <mmc.h>
 #include <u-boot/md5.h>
 #include <usb.h>