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/freescale/bsc9131rdb/bsc9131rdb.c b/board/freescale/bsc9131rdb/bsc9131rdb.c
index 871d066..75c2aec 100644
--- a/board/freescale/bsc9131rdb/bsc9131rdb.c
+++ b/board/freescale/bsc9131rdb/bsc9131rdb.c
@@ -5,6 +5,7 @@
 
 #include <common.h>
 #include <image.h>
+#include <init.h>
 #include <asm/processor.h>
 #include <asm/mmu.h>
 #include <asm/cache.h>