vendor-prefixes: Add prefix for Shenzhen SEI Robotics Co., Ltd

Add vendor prefix for the Shenzhen SEI Robotics Co., Ltd, a chinese ODM
specialized in Android TV HDMI Stick, OTT Box, Hybrid STB,
Smart Home Gateway & more.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -353,6 +353,7 @@ sandisk	Sandisk Corporation
 sbs	Smart Battery System
 schindler	Schindler
 seagate	Seagate Technology PLC
+seirobotics	Shenzhen SEI Robotics Co., Ltd
 semtech	Semtech Corporation
 sensirion	Sensirion AG
 sff	Small Form Factor Committee