dt-bindings: Add vendor Mellanox

This patch adds Mellanox vendor to vendor-prefixes.

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Rob Herring <robh@kernel.org>
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
index ae09487..8730f33 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -196,6 +196,7 @@
 megachips	MegaChips
 melexis	Melexis N.V.
 melfas	MELFAS Inc.
+mellanox	Mellanox Technologies
 memsic	MEMSIC Inc.
 merrii	Merrii Technology Co., Ltd.
 micrel	Micrel Inc.