serial: xilinx_uartps: kill CONFIG_OF conditional

The Zynq platform requires the use of CONFIG_OF.  Remove the #ifdef
conditionals in the uartps driver.  Make dependency explicit in Kconfig.
Signed-off-by: Josh Cartwright <josh.cartwright@ni.com>
Tested-by: Michal Simek <monstr@monstr.eu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/Kconfig

@@ -1376,6 +1376,7 @@ config SERIAL_MXS_AUART_CONSOLE
 
 config SERIAL_XILINX_PS_UART
 	tristate "Xilinx PS UART support"
+	depends on OF
 	select SERIAL_CORE
 	help
 	  This driver supports the Xilinx PS UART port.

drivers/tty/serial/xilinx_uartps.c

@@ -946,15 +946,11 @@ static int __devinit xuartps_probe(struct platform_device *pdev)
 	struct resource *res, *res2;
 	int clk = 0;
 
-#ifdef CONFIG_OF
 	const unsigned int *prop;
 
 	prop = of_get_property(pdev->dev.of_node, "clock", NULL);
 	if (prop)
 		clk = be32_to_cpup(prop);
-#else
-	clk = *((unsigned int *)(pdev->dev.platform_data));
-#endif
 	if (!clk) {
 		dev_err(&pdev->dev, "no clock specified\n");
 		return -ENODEV;
@@ -1044,16 +1040,11 @@ static int xuartps_resume(struct platform_device *pdev)
 }
 
 /* Match table for of_platform binding */
-
-#ifdef CONFIG_OF
 static struct of_device_id xuartps_of_match[] __devinitdata = {
 	{ .compatible = "xlnx,xuartps", },
 	{}
 };
 MODULE_DEVICE_TABLE(of, xuartps_of_match);
-#else
-#define xuartps_of_match NULL
-#endif
 
 static struct platform_driver xuartps_platform_driver = {
 	.probe   = xuartps_probe,		/* Probe method */