dt-bindings: Add vendor prefix for sensortek

Sensortek Technology Corp. produces Proximity Sensors with ALS and
Accelerometers.
Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/vendor-prefixes.yaml

@@ -813,6 +813,8 @@ patternProperties:
     description: Semtech Corporation
   "^sensirion,.*":
     description: Sensirion AG
+  "^sensortek,.*":
+    description: Sensortek Technology Corporation
   "^sff,.*":
     description: Small Form Factor Committee
   "^sgd,.*":