build: Bump tock-registers from 0.8.1 to 0.9.0

Bumps [tock-registers](https://github.com/tock/tock) from 0.8.1 to 0.9.0.
- [Release notes](https://github.com/tock/tock/releases)
- [Changelog](https://github.com/tock/tock/blob/master/CHANGELOG.md)
- [Commits](https://github.com/tock/tock/commits)

---
updated-dependencies:
- dependency-name: tock-registers
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Cargo.lock

@@ -32,7 +32,7 @@ r-efi = { version = "4.3.0", features = ["efiapi"] }
 linked_list_allocator = "0.10.4"
 
 [target.'cfg(target_arch = "aarch64")'.dependencies]
-tock-registers = "0.8.1"
+tock-registers = "0.9.0"
 aarch64-cpu = "9.4.0"
 fdt = "0.1.5"
 chrono = { version = "0.4", default-features = false }