There is a new pull request by MrLimb against master on the void-packages repository

https://github.com/MrLimb/void-packages master
https://github.com/void-linux/void-packages/pull/23900

nvidia340: add a patch for the linux-5.7 kernel
Reference to #23602 

A patch file from https://github.com/void-linux/void-packages/pull/23900.patch is attached