cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

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

common/Makefile

@@ -10,6 +10,7 @@ obj-y += main.o
 obj-y += exports.o
 obj-y += cli_getch.o cli_simple.o cli_readline.o
 obj-$(CONFIG_HUSH_OLD_PARSER) += cli_hush.o
+obj-$(CONFIG_HUSH_MODERN_PARSER) += cli_hush_modern.o
 obj-$(CONFIG_AUTOBOOT) += autoboot.o
 obj-y += version.o