devicetree: bindings: Add vendor prefix for Andes Technology Corporation

Add vendor-prefix for Andes Technology Corporation
Signed-off-by: Greentime Hu <green.hu@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -24,6 +24,7 @@ ampire	Ampire Co., Ltd.
 ams	AMS AG
 amstaos	AMS-Taos Inc.
 analogix	Analogix Semiconductor, Inc.
+andestech	Andes Technology Corporation
 apm	Applied Micro Circuits Corporation (APM)
 aptina	Aptina Imaging
 arasan	Arasan Chip Systems