Documentation: vendor-prefixes: Add option prefix

Add option to vendor-prefixes file which will be used for Option NV company.
Signed-off-by: NMarek Belisko <marek@goldelico.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -150,6 +150,7 @@ nvidia	NVIDIA
 nxp	NXP Semiconductors
 onnn	ON Semiconductor Corp.
 opencores	OpenCores.org
+option	Option NV
 ortustech	Ortus Technology Co., Ltd.
 ovti	OmniVision Technologies
 panasonic	Panasonic Corporation