dt-bindings: Add Vendor prefix for Einfochips

Add devicetree vendor prefix for Einfochips.
https://www.einfochips.com/Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

Documentation/devicetree/bindings/vendor-prefixes.yaml

@@ -269,6 +269,8 @@ patternProperties:
     description: Emerging Display Technologies
   "^eeti,.*":
     description: eGalax_eMPIA Technology Inc
+  "^einfochips,.*":
+    description: Einfochips
   "^elan,.*":
     description: Elan Microelectronic Corp.
   "^elgin,.*":