of: add vendor prefix for SMSC

Add a vendor prefix for Standard Microsystems Corporation, now part of
Microchip.

Signed-off-by: Florian Vaussard <florian.vaussard@epfl.ch>
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 40ce2df..7187c71 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -80,6 +80,7 @@
 silabs	Silicon Laboratories
 simtek
 sirf	SiRF Technology, Inc.
+smsc	Standard Microsystems Corporation
 snps 	Synopsys, Inc.
 spansion	Spansion Inc.
 st	STMicroelectronics