Benjamin Valentin 5f002ced1f Revert "cpu/sam0_common: UART: implement inverted RX & TX"
This reverts commit 585dc15f99d8a89766bb12d064fa2209909a1b6d.

I did misunderstand this feature: This only inverts the data
bits (instead of `c` uart will transmit `~c`), not the whole
line level.

This is not very useful on it's own, so revert it.
2021-05-21 12:47:03 +02:00
..
2021-01-12 15:48:39 +01:00