How to fix the gyro sensor bug in a rom?

I recently flashed the official lollilop 5.1 from kitkat 4.4.2. After flashing when i checked for sensors in cpu z or any other app, gyro is missing from there. Then I checked that the developers have forgotten to put the driver files for gyro. So anyhow can I flash the files from the stock kitkat? Which files to flash btw?

Sent from my Micromax E313 using XDA Free mobile app