Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

needed to use menu framework

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

For some environments the dummy malloc functions offer a very small
alternative implementation. malloc will get its memory from sbrk()
and never frees memory again.
This of course is not suitable for interactive environments and thus
depends on CONFIG_SHELL_NONE

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>