nvfbcwrp: registry entry to allow NvFBC use

[Snoop05]

For software like Steam to be able to use NvFBC it is required to also set
DWORD value HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\nvlddmkm\NVFBCEnable to 1
(needs reboot / driver restart)

Would be good to mention it in nvfbcwrp readme

[Snawoot]

I don't know what this registry does. Is it same as https://github.com/vparitskiy/enable-disable-NVFBC ?

Can you please edit that README file and submit pull request?

[Snoop05]

Yes, that tool also sets the value, but i think having it at least a bit documented is better than running some random executable that doesn't come with source.

[Snawoot]

Right, I didn't mean it's better anyhow, I just was curious to understand if it is the same thing or not.

[Snawoot]

Fixed via #360