Update gpiote.rs

Adding these changes enables us to define a channel using a mutable reference to `GPIOTE_CH(n)`, similar to how we can do with other drivers.
So instead of using:
```rust
let freq_in = InputChannel::new(
    p.GPIOTE_CH0,
    Input::new(&mut p.P0_19, embassy_nrf::gpio::Pull::Up),
    embassy_nrf::gpiote::InputChannelPolarity::HiToLo,
);
```
we can use:
```rust
let freq_in = InputChannel::new(
    &mut p.GPIOTE_CH0,
    Input::new(&mut p.P0_19, embassy_nrf::gpio::Pull::Up),
    embassy_nrf::gpiote::InputChannelPolarity::HiToLo,
);
```

0 files changed, 0 insertions, 0 deletions