ARM: 7312/1: only show modules in the memory layout for MODULES=y

This line is irritating and wrong when modules are not supported, so
don't show it then.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>