dt-bindings: add jianda vendor prefix

This adds a vendor prefix "jianda" for Jiandangjing Technology Co., Ltd.
Signed-off-by: NDavid Lechner <david@lechnology.com>
Reviewed-by: NRob Herring <robh@kernel.org>
Signed-off-by: NNoralf Trønnes <noralf@tronnes.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1514833336-22564-2-git-send-email-david@lechnology.com

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -173,6 +173,7 @@ itead	ITEAD Intelligent Systems Co.Ltd
 iwave  iWave Systems Technologies Pvt. Ltd.
 jdi	Japan Display Inc.
 jedec	JEDEC Solid State Technology Association
+jianda	Jiandangjing Technology Co., Ltd.
 karo	Ka-Ro electronics GmbH
 keithkoep	Keith & Koep GmbH
 keymile	Keymile GmbH