global_data.h: add GD_FLG_HUSH_OLD_PARSER flag

This flag is used to indicate we are using the hush parser.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

include/asm-generic/global_data.h

@@ -697,6 +697,10 @@ enum gd_flags {
 	 * @GD_FLG_BLOBLIST_READY: bloblist is ready for use
 	 */
 	GD_FLG_BLOBLIST_READY = 0x800000,
+	/**
+	 * @GD_FLG_HUSH_OLD_PARSER: Use hush old parser.
+	 */
+	GD_FLG_HUSH_OLD_PARSER = 0x1000000,
 };
 
 #endif /* __ASSEMBLY__ */