partially fix bug [4026143] Gyro sample rate is inconsistant with datasheet

Report 840 Hz instead of 833 Hz in the HAL. 840 Hz matches the datasheet.
The actual sampling rate seems to be higher, which still needs to be
investigated.

Bug: 4026143
Change-Id: Ia5a45b131c304404db262e1bfe3d69c7a3a00c58
diff --git a/libsensors/sensors.cpp b/libsensors/sensors.cpp
index 4ba1265..ec2d754 100644
--- a/libsensors/sensors.cpp
+++ b/libsensors/sensors.cpp
@@ -90,7 +90,7 @@
         { "K3G Gyroscope sensor",
           "STMicroelectronics",
           1, SENSORS_GYROSCOPE_HANDLE,
-          SENSOR_TYPE_GYROSCOPE, RANGE_GYRO, CONVERT_GYRO, 6.1f, 1200, { } },
+          SENSOR_TYPE_GYROSCOPE, RANGE_GYRO, CONVERT_GYRO, 6.1f, 1190, { } },
 };