drivers: serial: nrfx_uarte2: Clean error state on rx_enable

Clean error state on re-enabling RX. If previous transmission ended with
an error it should not impact next receiving session.

Signed-off-by: Krzysztof Chruściński <[email protected]>

Author: nordic-krch

drivers/serial/uart_nrfx_uarte2.c

@@ -497,6 +497,7 @@ static int api_rx_enable(const struct device *dev, uint8_t *buf, size_t len, int
 	 * flags are already known to the driver (e.g. if flushed data shall be
 	 * kept or not).
 	 */
+	adata->err = 0;
 	adata->en_rx_buf = buf;
 	adata->en_rx_len = len;