DT: add vendor prefix for EBV Elektronik

Add vendor prefix for EBV Elektronik.
Signed-off-by: NSteffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: NRob Herring <robh@kernel.org>

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -38,6 +38,7 @@ denx	Denx Software Engineering
 digi	Digi International Inc.
 dlink	D-Link Corporation
 dmo	Data Modul AG
+ebv	EBV Elektronik
 edt	Emerging Display Technologies
 emmicro	EM Microelectronic
 epfl	Ecole Polytechnique Fédérale de Lausanne