test: Add framework to test hush behavior

Introduce a new subcommand to ut: ut hush.
For the moment, this command does nothing, future commits will add tests which
will be run on command call.

Note that CONFIG_HUSH_PARSER must be defined to compile this new subcommand.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/include/test/suites.h b/include/test/suites.h
index 49224d8..365d5f2 100644
--- a/include/test/suites.h
+++ b/include/test/suites.h
@@ -43,6 +43,7 @@
 int do_ut_exit(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
 int do_ut_fdt(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
 int do_ut_font(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
+int do_ut_hush(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
 int do_ut_lib(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
 int do_ut_loadm(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
 int do_ut_log(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[]);