spi/xilinx: Remove CONFIG_OF from the driver

dev.of_node is in struct device all the time.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

drivers/spi/spi-xilinx.c

@@ -356,7 +356,6 @@ static int xilinx_spi_probe(struct platform_device *pdev)
 		bits_per_word = pdata->bits_per_word;
 	}
 
-#ifdef CONFIG_OF
 	if (pdev->dev.of_node) {
 		const __be32 *prop;
 		int len;
@@ -367,7 +366,6 @@ static int xilinx_spi_probe(struct platform_device *pdev)
 		if (prop && len >= sizeof(*prop))
 			num_cs = __be32_to_cpup(prop);
 	}
-#endif
 
 	if (!num_cs) {
 		dev_err(&pdev->dev,