Introduce CV32A60X as first release

[MikeOpenHWGroup]

As discuss on MatterMost, here is proposed change to the requirements spec to introduce the initial configuration of the CVA6.

[JeanRochCoulon]

Hi Mike, it looks fine to me ! Could you just replace sv39 by sv32 for MMU, when we are in 32bits, sv is lower than 32

[MikeOpenHWGroup]

Hi Mike, it looks fine to me ! Could you just replace sv39 by sv32 for MMU, when we are in 32bits, sv is lower than 32

Done. Thanks for the catch.

[jquevremont]

The way to present configurations is excellent.
Pedantic: CVFPU is not defined. I suggest to either define it at the end of the document or revert to FPU. (not a blocking comment)

[MikeOpenHWGroup]

Pedantic: CVFPU is not defined. I suggest to either define it at the end of the document or revert to FPU. (not a blocking comment)

Good point. I have replaced all instances of "CVFPU" with "FPU".

[jquevremont]

LGTM