serial: sprd: remove redundant sprd_port cleanup

We don't need to cleanup sprd_port anymore, since we've dropped the way
of using the sprd_port[] array to get port index.
Reviewed-by: Baolin Wang <baolin.wang7@gmail.com>
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Link: https://lore.kernel.org/r/20200318105049.19623-3-zhang.lyra@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/sprd_serial.c

@@ -1236,10 +1236,8 @@ static int sprd_probe(struct platform_device *pdev)
 	sprd_ports_num++;
 
 	ret = uart_add_one_port(&sprd_uart_driver, up);
-	if (ret) {
-		sprd_port[index] = NULL;
+	if (ret)
 		sprd_remove(pdev);
-	}
 
 	platform_set_drvdata(pdev, up);