Non-blocking TWIS, use embedded-dma

[kalkyl]

• Added non-blocking DMA transactions to the TWIS module and renamed the old blocking ones to rx_blocking and tx_blocking. Using the embedded-dma traits.
• Added support for 9160.
• Added Sealed bound and Interrupt const to Instance.
• Added some missing getters and events.
• Renamed some setter functions for consistency.
• Added demo of non-blocking usage: https://github.com/kalkyl/nrf-hal/blob/twis-dma/examples/twis-dma-demo/src/main.rs

[jonas-schievink]

Nice!

[jonas-schievink]

@kalkyl looks like this has some merge conflicts now. If you address those I can merge.