serial: xilinx_uartps: Remove leftover __exit_p()

__exit_p() need to be removed after the __devexit
removal from the driver.

Warning log:
drivers/tty/serial/xilinx_uartps.c:996:12:
warning: 'xuartps_remove' defined but not used [-Wunused-function]
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/xilinx_uartps.c

@@ -1044,7 +1044,7 @@ MODULE_DEVICE_TABLE(of, xuartps_of_match);
 
 static struct platform_driver xuartps_platform_driver = {
 	.probe   = xuartps_probe,		/* Probe method */
-	.remove  = __exit_p(xuartps_remove),	/* Detach method */
+	.remove  = xuartps_remove,		/* Detach method */
 	.suspend = xuartps_suspend,		/* Suspend */
 	.resume  = xuartps_resume,		/* Resume after a suspend */
 	.driver  = {