[Nouveau] How to enable OpenCL device in Clover ?

[Timothy Madden]

Hello,

I can see from the mesamatrix page at:

	https://mesamatrix.net/

that NVC0 should support OpenCL 1.2, without the optional image formats 
and device partitioning.

But I have never seen and OpenCL device in Clover for my NVIDIA cards, 
am I missing something ?

I have the following chips:
	- Fermi GF117 (GeForce 710M)
	- Kepler GK208B (GeForce GT 710)
	- Turing TU102 (RTX 2080 Ti)
	- Ampere GA102 (RTX 3090)

(of these, the GF117 chip actually falls in the NVC0 family according to 
the web page for CodeNames: https://nouveau.freedesktop.org/CodeNames.html)

For my latest NVIDIA card (3090) I compiled mesa from git, with the 
OpenCL frontend and spirV option set tot true, and I still get no OpenCL 
device from Clover.

Do I need some specific hardware, and only that is supposed to work ? Do 
I need some option I do not know about ?

--
Thank you,
Timothy Madden