common: Drop part.h from common header

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/cmd/ab_select.c b/cmd/ab_select.c
index d0d957d..7a4e515 100644
--- a/cmd/ab_select.c
+++ b/cmd/ab_select.c
@@ -3,8 +3,10 @@
  * Copyright (C) 2017 The Android Open Source Project
  */
 
+#include <common.h>
 #include <android_ab.h>
 #include <command.h>
+#include <part.h>
 
 static int do_ab_select(cmd_tbl_t *cmdtp, int flag, int argc,
 			char * const argv[])