dt-bindings: Add vendor prefix for Samtec

Add a vendor prefix for Samtec, a Softing company.

http://www.samtec.de
http://www.samtec.orgSigned-off-by: NDinh Nguyen <dinguyen@kernel.org>
Signed-off-by: NRob Herring <robh@kernel.org>

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -233,6 +233,7 @@ richtek	Richtek Technology Corporation
 ricoh	Ricoh Co. Ltd.
 rockchip	Fuzhou Rockchip Electronics Co., Ltd
 samsung	Samsung Semiconductor
+samtec	Samtec/Softing company
 sandisk	Sandisk Corporation
 sbs	Smart Battery System
 schindler	Schindler