gpu: nova-core: Hopper/Blackwell: basic GPU identification

gpu: nova-core: Hopper/Blackwell: basic GPU identification

Hopper (GH100) and Blackwell identification, including ELF
.fwsignature_* items.

Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Acked-by: Danilo Krummrich <dakr@kernel.org>
Reviewed-by: Gary Guo <gary@garyguo.net>
Link: https://patch.msgid.link/20260411024953.473149-4-jhubbard@nvidia.com
[acourbot: add separators for both Blackwell architectures in Chipset
 definition.]
[acourbot: make Gsp::boot() return `ENOTSUPP` on new architectures.]
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>