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/ea/mx7ulp_com/mx7ulp_com.c b/board/ea/mx7ulp_com/mx7ulp_com.c
index 6fc1631..a9b8a32 100644
--- a/board/ea/mx7ulp_com/mx7ulp_com.c
+++ b/board/ea/mx7ulp_com/mx7ulp_com.c
@@ -4,6 +4,7 @@
  */
 
 #include <common.h>
+#include <init.h>
 #include <asm/io.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/arch/mx7ulp-pins.h>