of: Add vendor prefix for Analogix Semiconductor

Analogix Semiconductor Inc. develops analog and mixed-signal devices for
digital media and communications interconnect applications.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -22,6 +22,7 @@ amlogic	Amlogic, Inc.
 ampire	Ampire Co., Ltd.
 ams	AMS AG
 amstaos	AMS-Taos Inc.
+analogix	Analogix Semiconductor, Inc.
 apm	Applied Micro Circuits Corporation (APM)
 aptina	Aptina Imaging
 arasan	Arasan Chip Systems