Screen/PsychtoolboxKernelDriver: Move NV-D0 gpu's into the NV-E0 category.

Treat D0 chips as E0 family chips for all display engine handling,
e.g., beam position queries.
This is consistent with nouveau-kms, which treats d0, e0 and f0+ as one
family wrt. to display engine properties. It contradicts what the
nouveu wiki says (about e0, f0+ being a new generation), but we trust
the code a bit more and make it consistent with nouveau. I don’t have
access to any d0 class hardware, so let’s just hope it does the right
thing.
-> Linux and OSX source code updated. No recompile yet.