fpga: zynq: Remove clk_get error message for probe defer

In probe, the driver checks for devm_clk_get return and print error
message in the failing case. However for -EPROBE_DEFER this message is
confusing so avoid it.

The similar change was done also by commit 28910cee89
("fpga: xilinx-pr-decoupler: Remove clk_get error message for probe defer")

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Moritz Fischer <mdf@kernel.org>

drivers/fpga/zynq-fpga.c

@@ -583,6 +583,7 @@ static int zynq_fpga_probe(struct platform_device *pdev)
 
 	priv->clk = devm_clk_get(dev, "ref_clk");
 	if (IS_ERR(priv->clk)) {
+		if (PTR_ERR(priv->clk) != -EPROBE_DEFER)
 			dev_err(dev, "input clock not found\n");
 		return PTR_ERR(priv->clk);
 	}