ARM: dts: imx28/imx53: enable edt-ft5x06 wakeup source

The touchscreen driver no longer configures the device as wakeup source by
default. A "wakeup-source" property is needed.

To avoid regressions, this patch changes the DTS files for the only two
users of this driver that didn't have this property yet.

Signed-off-by: Daniel Mack <daniel@zonque.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>