dt-bindings: vendor-prefixes: Add kobol prefix

The prefix is already used in arm/armada-388-helios4.dts.
Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20201014200030.845759-2-uwe@kleine-koenig.orgSigned-off-by: Heiko Stuebner <heiko@sntech.de>

Documentation/devicetree/bindings/vendor-prefixes.yaml

@@ -553,6 +553,8 @@ patternProperties:
     description: Kionix, Inc.
   "^kobo,.*":
     description: Rakuten Kobo Inc.
+  "^kobol,.*":
+    description: Kobol Innovations Pte. Ltd.
   "^koe,.*":
     description: Kaohsiung Opto-Electronics Inc.
   "^kontron,.*":