drivers: serial: ra_sci: add missing break in callback_adapter

Added missing `break` statement in `uart_ra_sci_callback_adapter`
for the `UART_EVENT_RX_COMPLETE` case.
Without it, `async_evt_rx_err()` would be called, which is not
the desired operation.

Signed-off-by: Pisit Sawangvonganan <[email protected]>

Author: ndrs-pst

drivers/serial/uart_renesas_ra_sci.c

@@ -864,6 +864,7 @@ static void uart_ra_sci_callback_adapter(struct st_uart_callback_arg *fsp_args)
 		break;
 	case UART_EVENT_RX_COMPLETE:
 		async_evt_rx_complete(dev);
+		break;
 	case UART_EVENT_ERR_PARITY:
 		async_evt_rx_err(dev, UART_ERROR_PARITY);
 		break;