of: Add vendor prefix for Himax Technologies Inc.

Signed-off-by: NLiu Ying <Ying.Liu@freescale.com>
Signed-off-by: NRob Herring <robh@kernel.org>

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -71,6 +71,7 @@ gumstix	Gumstix, Inc.
 gw	Gateworks Corporation
 hannstar	HannStar Display Corporation
 haoyu	Haoyu Microelectronic Co. Ltd.
+himax	Himax Technologies, Inc.
 hisilicon	Hisilicon Limited.
 hit	Hitachi Ltd.
 honeywell	Honeywell