ARM: dts: imx53-smd: Add OV5642 video capture support

Add video capture support from the OV5642 to IPU CSI0 on
the i.MX53 SMD.

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
[fabio: remove unnecessary 'regulator-always-on' from camera regulators]
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>