of: Add Silicon Image vendor prefix

"sil" is the most commonly used abbreviation for Silicon
Image products.

Signed-off-by: Pawel Moll <pawel.moll@arm.com>
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
index e855278..874921e 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -33,6 +33,7 @@
 ramtron	Ramtron International
 samsung	Samsung Semiconductor
 schindler	Schindler
+sil	Silicon Image
 simtek
 sirf	SiRF Technology, Inc.
 stericsson	ST-Ericsson