rust: block: fix generated bindings after refactoring of features

Block device features and flags were refactored from `enum` to `#define`.
This broke Rust binding generation. This patch fixes the binding
generation.

Fixes: fcf865e3 ("block: convert features and flags to __bitwise types")
Signed-off-by: Andreas Hindborg <a.hindborg@samsung.com>
Acked-by: Miguel Ojeda <ojeda@kernel.org>
Link: https://lore.kernel.org/r/20240628091152.2185241-1-nmi@metaspace.dk


Signed-off-by: Jens Axboe <axboe@kernel.dk>