dt-binding: add vendor prefix for SolidRun

SolidRun is a company from Israel producing small-sized home-media
computers like the Marvell Dove based CuBox and Freescale IMX based
CuBox-i. Document the missing vendor prefix.
Signed-off-by: NSebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Link: https://lkml.kernel.org/r/1401140009-31505-1-git-send-email-sebastian.hesselbarth@gmail.comAcked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NJason Cooper <jason@lakedaemon.net>

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -121,6 +121,7 @@ sii	Seiko Instruments, Inc.
 sirf	SiRF Technology, Inc.
 smsc	Standard Microsystems Corporation
 snps 	Synopsys, Inc.
+solidrun	SolidRun
 spansion	Spansion Inc.
 st	STMicroelectronics
 ste	ST-Ericsson