imx/mx1: add newline at end of Makefile

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
Cc: Darius Augulis <augulis.darius@gmail.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>