ARM: imx6: fix cleanup path in imx6q_suspend_init()

The wrong pointer is passed to the ioumap function in the cleanup path

Signed-off-by: Jean-Christophe Dubois <jcd@tribudubois.net>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>