ASoC: ALC5632: Add device tree binding documentation

Document the device tree binding for the ALC5632 codec and update vendor
specific prefix for the Realtek.

Signed-off-by: Leon Romanovsky <leon@leon.nu>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
index ecc6a6c..ca8ee14 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -33,6 +33,7 @@
 powervr	Imagination Technologies
 qcom	Qualcomm, Inc.
 ramtron	Ramtron International
+realtek Realtek Semiconductor Corp.
 samsung	Samsung Semiconductor
 sbs	Smart Battery System
 schindler	Schindler