Add more fakes

[qwandor]

No description provided.

[imre-kis-arm]

This PR looks good to me, it works fine with arm-fvp-base-pac and rust-spmc too.
My only concern is the default target in .cargo/config.toml.
Running cargo test now requires explicitly specifying the --target [host target] parameter, which ties the command to a specific architecture. This makes it difficult to write test or CI scripts that are architecture-independent.
In contrast, for cargo build we always know that the target is aarch64-* or arm-* regardless of the host architecture, so hard coding the target is acceptable.
Ideally, we could select whether this configuration value applies to cargo test, but currently, there doesn't seem to be a way to do that.

[qwandor]

Fair point. I've removed the .cargo/config.toml now.

[imre-kis-arm]

LGTM, thanks.