cli: Add menu for hush parser

For the moment, the menu contains only entry: HUSH_OLD_PARSER which is the
default.
The goal is to prepare the field to add a new hush parser which guarantees
actual behavior is still correct.

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

common/Makefile

@@ -9,7 +9,7 @@ obj-y += init/
 obj-y += main.o
 obj-y += exports.o
 obj-y += cli_getch.o cli_simple.o cli_readline.o
-obj-$(CONFIG_HUSH_PARSER) += cli_hush.o
+obj-$(CONFIG_HUSH_OLD_PARSER) += cli_hush.o
 obj-$(CONFIG_AUTOBOOT) += autoboot.o
 obj-y += version.o