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/ls2080a/ls2080a.c b/board/freescale/ls2080a/ls2080a.c
index f144bf6..95e99ea 100644
--- a/board/freescale/ls2080a/ls2080a.c
+++ b/board/freescale/ls2080a/ls2080a.c
@@ -3,6 +3,7 @@
  * Copyright 2014 Freescale Semiconductor
  */
 #include <common.h>
+#include <init.h>
 #include <malloc.h>
 #include <errno.h>
 #include <net.h>