rust: io: register: support fixed offset register without bitfield

Add a rule to allow creating `IoLoc` in `register!()` using an existing
type and not create a bitfield. Add an example to demonstrate this for FIFO
registers.

This rule is also going to be used to create subregions for registers; the
example of doing so will be added later when relative registers are
removed.

Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Gary Guo <gary@garyguo.net>
Tested-by: Alexandre Courbot <acourbot@nvidia.com>
Link: https://patch.msgid.link/20260901-typed_register-v4-11-5552b1d59525@garyguo.net
Signed-off-by: Danilo Krummrich <dakr@kernel.org>

0 files changed, 0 insertions, 0 deletions