dt-bindings: define vendor prefix for Wi2Wi, Inc.

Introduce vendor prefix for Wi2Wi, Inc. for W2SG0004 GPS module
and W2CBW003 Bluetooth/WiFi combo (CSR/Marvell).
Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -395,6 +395,7 @@ vot	Vision Optical Technology Co., Ltd.
 wd	Western Digital Corp.
 wetek	WeTek Electronics, limited.
 wexler	Wexler
+wi2wi	Wi2Wi, Inc.
 winbond Winbond Electronics corp.
 winstar	Winstar Display Corp.
 wlf	Wolfson Microelectronics