Adding GL5712 support

[PovilasID]

• I have searched the issues of this repository and believe that this is not a duplicate.

Summary

Adding support for maxiiot's GL5712.
Here are the docs and patch for it and patching guide.
I have no clue if this is enough but that is I was able to find from the manufacturer

What is the use-case?

Implementation description

Can you implement this by yourself and make a pull request?