Whether Lollipop support Snapdragon 401 ???

#1
Hi friends,
I'm having redmi note 4g device. Currently it is running Kitkat 4.4.4. After various search snapdragon 401 processor supports Lollipop os. I got some custom roms. Whether rooting my device is useful or it will harm?
After rooting only i'll get lollipop update on my phone.