serial: imx: Remove unused members from imx_port struct

IRDA support is gone since commit afe9cbb1a6 ("serial: imx: drop
support for IRDA"), so remove the remaining irda members from
imx_port structure.

While at it, also remove 'trcv_delay' which is also unused.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/imx.c

@@ -207,9 +207,6 @@ struct imx_port {
 	unsigned int		have_rtscts:1;
 	unsigned int		have_rtsgpio:1;
 	unsigned int		dte_mode:1;
-	unsigned int		irda_inv_rx:1;
-	unsigned int		irda_inv_tx:1;
-	unsigned short		trcv_delay; /* transceiver delay */
 	struct clk		*clk_ipg;
 	struct clk		*clk_per;
 	const struct imx_uart_data *devdata;