atmel_serial: keep the platform_device unchanged

specify the port num via platform_data this will allow to match the clock
with the plaform_dev staticaly

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Patrice Vilchez <patrice.vilchez@atmel.com>
Cc: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Cc: Greg Kroah-Hartman <gregkh@suse.de>

arch/arm/mach-at91/at91rm9200_devices.c

@@ -1109,6 +1109,7 @@ struct platform_device *atmel_default_console_device;	/* the serial console devi
 void __init at91_register_uart(unsigned id, unsigned portnr, unsigned pins)
 {
 	struct platform_device *pdev;
+	struct atmel_uart_data *pdata;
 
 	switch (id) {
 		case 0:		/* DBGU */
@@ -1139,7 +1140,8 @@ void __init at91_register_uart(unsigned id, unsigned portnr, unsigned pins)
 		default:
 			return;
 	}
-	pdev->id = portnr;		/* update to mapped ID */
+	pdata = pdev->dev.platform_data;
+	pdata->num = portnr;		/* update to mapped ID */
 
 	if (portnr < ATMEL_MAX_UART)
 		at91_uarts[portnr] = pdev;