fpga: xilinx-pr-decoupler: Simplify code by using dev_err_probe()

Use already prepared dev_err_probe() introduced by commit a787e540
("driver core: add device probe log helper").
It simplifies EPROBE_DEFER handling.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/fpga/xilinx-pr-decoupler.c

@@ -100,11 +100,9 @@ static int xlnx_pr_decoupler_probe(struct platform_device *pdev)
 		return PTR_ERR(priv->io_base);
 
 	priv->clk = devm_clk_get(&pdev->dev, "aclk");
-	if (IS_ERR(priv->clk)) {
-		if (PTR_ERR(priv->clk) != -EPROBE_DEFER)
-			dev_err(&pdev->dev, "input clock not found\n");
-		return PTR_ERR(priv->clk);
-	}
+	if (IS_ERR(priv->clk))
+		return dev_err_probe(&pdev->dev, PTR_ERR(priv->clk),
+				     "input clock not found\n");
 
 	err = clk_prepare_enable(priv->clk);
 	if (err) {