dt-bindings: add vendor prefix for exegin

Add vendor prefix for Exegin Technologies Limited.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210816064416.1630674-6-claudiu.beznea@microchip.com

Documentation/devicetree/bindings/vendor-prefixes.yaml

@@ -397,6 +397,8 @@ patternProperties:
     description: Exar Corporation
   "^excito,.*":
     description: Excito
+  "^exegin,.*":
+    description: Exegin Technologies Limited
   "^ezchip,.*":
     description: EZchip Semiconductor
   "^facebook,.*":