of: Add vendor prefix for OmniVision Technologies

OmniVision Technologies is a manufacturer of CMOS Image Sensors.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NRob Herring <robh@kernel.org>

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -120,6 +120,7 @@ nvidia	NVIDIA
 nxp	NXP Semiconductors
 onnn	ON Semiconductor Corp.
 opencores	OpenCores.org
+ovti	OmniVision Technologies
 panasonic	Panasonic Corporation
 pericom	Pericom Technology Inc.
 phytec	PHYTEC Messtechnik GmbH