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/intel/crownbay/crownbay.c b/board/intel/crownbay/crownbay.c
index 57dce41..55095de 100644
--- a/board/intel/crownbay/crownbay.c
+++ b/board/intel/crownbay/crownbay.c
@@ -4,6 +4,7 @@
  */
 
 #include <common.h>
+#include <init.h>
 #include <asm/ibmpc.h>
 #include <asm/pnp_def.h>
 #include <smsc_lpc47m.h>