devicetree: add Roofull vendor prefix

Add the "roofull" vendor prefix for Shenzhen Roofull Technology Co, Ltd.
Signed-off-by: Marcus Cooper <codekipper@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -270,6 +270,7 @@ ricoh	Ricoh Co. Ltd.
 rikomagic	Rikomagic Tech Corp. Ltd
 rockchip	Fuzhou Rockchip Electronics Co., Ltd
 rohm	ROHM Semiconductor Co., Ltd
+roofull	Shenzhen Roofull Technology Co, Ltd
 samsung	Samsung Semiconductor
 samtec	Samtec/Softing company
 sandisk	Sandisk Corporation