[FIX] clippy warnings

[trembel]

This commits fixes various warnings on Rust 1.89 because of elided lifetimes as well as usage of div_ceil:

warning: hiding a lifetime that's elided elsewhere is confusing
    --> src/ll.rs:570:36
     |
570  |                   pub fn $name_lower(&mut self) -> RegAccessor<$name, SPI> {
     |                                      ^^^^^^^^^     ----------------------- the same lifetime is hidden here     |                                      |
     |                                      the lifetime is elided here
...
633  | / impl_register! {
634  | |
635  | |     0x00, 0x00, 4, RO, DEV_ID(dev_id) { /// Device identifier
636  | |         rev,     0,  3, u8;  /// Revision
...    |
1653 | | }
     | |_- in this macro invocation
     |
     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
     = note: this warning originates in the macro `impl_register` (in Nightly builds, run with -Z macro-backtrace for more info)
help: use `'_` for type paths
     |
570  |                 pub fn $name_lower(&mut self) -> RegAccessor<'_, $name, SPI> {
     |                                                              +++

warning: hiding a lifetime that's elided elsewhere is confusing
    --> src/ll.rs:1682:22
     |
1682 |     pub fn tx_buffer(&mut self) -> RegAccessor<TX_BUFFER, SPI> {
     |                      ^^^^^^^^^     --------------------------- the same lifetime is hidden here
     |                      |
     |                      the lifetime is elided here
     |
     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
help: use `'_` for type paths
     |
1682 |     pub fn tx_buffer(&mut self) -> RegAccessor<'_, TX_BUFFER, SPI> {
     |                                                +++

warning: hiding a lifetime that's elided elsewhere is confusing
    --> src/ll.rs:1731:24
     |
1731 |     pub fn rx_buffer_0(&mut self) -> RegAccessor<RX_BUFFER_0, SPI> {
     |                        ^^^^^^^^^     ----------------------------- the same lifetime is hidden here
     |                        |
     |                        the lifetime is elided here
     |
     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
help: use `'_` for type paths
     |
1731 |     pub fn rx_buffer_0(&mut self) -> RegAccessor<'_, RX_BUFFER_0, SPI> {
     |                                                  +++

warning: hiding a lifetime that's elided elsewhere is confusing
    --> src/ll.rs:1792:24
     |
1792 |     pub fn rx_buffer_1(&mut self) -> RegAccessor<RX_BUFFER_1, SPI> {
     |                        ^^^^^^^^^     ----------------------------- the same lifetime is hidden here
     |                        |
     |                        the lifetime is elided here
     |
     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
help: use `'_` for type paths
     |
1792 |     pub fn rx_buffer_1(&mut self) -> RegAccessor<'_, RX_BUFFER_1, SPI> {
     |                                                  +++

warning: `dw3000-ng` (lib) generated 4 warnings

[ProfFan]

CI fails?

[trembel]

CI fails?

very strange; can't replicate on my PC using Rust 1.89.0... Fixing nevertheless

[ProfFan]

[Invalid workflow file: .github/workflows/rust.yml#L1](https://github.com/ProfFan/dw3000-ng/actions/runs/17033146956/workflow)
(Line: 31, Col: 7): 'run' is already defined