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/pandora/pandora.c b/board/pandora/pandora.c
index a9aae79..bb310d9 100644
--- a/board/pandora/pandora.c
+++ b/board/pandora/pandora.c
@@ -14,6 +14,7 @@
  */
 #include <common.h>
 #include <dm.h>
+#include <init.h>
 #include <ns16550.h>
 #include <twl4030.h>
 #include <asm/io.h>