dt-bindings: arm: amlogic: add amediatech x96-max bindings

Add new vendor for amediatech, and initial board: x96-max
Signed-off-by: NKevin Hilman <khilman@baylibre.com>

Documentation/devicetree/bindings/arm/amlogic.txt

@@ -109,6 +109,7 @@ Board compatible values (alphabetically, grouped by SoC):
   - "amlogic,s400" (Meson axg a113d)
 
   - "amlogic,u200" (Meson g12a s905d2)
+  - "amediatech,x96-max" (Meson g12a s905x2)
 
 Amlogic Meson Firmware registers Interface
 ------------------------------------------

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -24,6 +24,7 @@ amarula	Amarula Solutions
 amazon	Amazon.com, Inc.
 amcc	Applied Micro Circuits Corporation (APM, formally AMCC)
 amd	Advanced Micro Devices (AMD), Inc.
+amediatech	Shenzhen Amediatech Technology Co., Ltd
 amlogic	Amlogic, Inc.
 ampire	Ampire Co., Ltd.
 ams	AMS AG