Revert "serial: imx: Initialize lock for non-registered console"

This reverts commit 8f065ac.

There has been a quick fix against uninitialised lock revealed by
the commit f743061 ("serial: core: Initialise spin lock before use
in uart_configure_port()"). Since we have now better fix in serial core,
this may be safely reverted.

Fixes: 8f065ac ("serial: imx: Initialize lock for non-registered console")
Depends-on: f743061 ("serial: core: Initialise spin lock before use in uart_configure_port()")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200711135346.71171-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/imx.c

@@ -2406,9 +2406,6 @@ static int imx_uart_probe(struct platform_device *pdev)
 		}
 	}
 
-	/* We need to initialize lock even for non-registered console */
-	spin_lock_init(&sport->port.lock);
-
 	imx_uart_ports[sport->port.line] = sport;
 
 	platform_set_drvdata(pdev, sport);