common: Drop init.h from common header

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/Marvell/db-88f6281-bp/db-88f6281-bp.c b/board/Marvell/db-88f6281-bp/db-88f6281-bp.c
index 729516d..a6f1167 100644
--- a/board/Marvell/db-88f6281-bp/db-88f6281-bp.c
+++ b/board/Marvell/db-88f6281-bp/db-88f6281-bp.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0+
 
 #include <common.h>
+#include <init.h>
 #include <net.h>
 #include <linux/io.h>
 #include <miiphy.h>