dt-bindings: vendor-prefixes: Add ASL Xiamen Technology

ASL Xiamen Technology Co. Ltd. is a Chinese high-speed interface and
display system chip design company. Adding it to the vendor prefixes.

Link: https://www.asl-tek.com/

Signed-off-by: Ettore Chimenti <[e-mail]>
Signed-off-by: Georg Gottleuber <[e-mail]>
Acked-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Neil Armstrong <[e-mail]>
Link: https://patch.msgid.link/[e-mail]

Documentation/devicetree/bindings/vendor-prefixes.yaml

···
     description: All Sensors Corporation
   "^asix,.*":
     description: ASIX Electronics Corporation
+  "^asl-tek,.*":
+    description: ASL Xiamen Technology Co., Ltd.
   "^aspeed,.*":
     description: ASPEED Technology Inc.
   "^asrock,.*":