irqchip/imx-intmux: Use dev_err_probe() to simplify error handling

dev_err_probe() can reduce code size, uniform error handling and record the
defer probe reason etc., use it to simplify the code.

Signed-off-by: Anson Huang <[e-mail]>
Signed-off-by: Marc Zyngier <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/irqchip/irq-imx-intmux.c

···
 	}
 
 	data->ipg_clk = devm_clk_get(&pdev->dev, "ipg");
-	if (IS_ERR(data->ipg_clk)) {
-		ret = PTR_ERR(data->ipg_clk);
-		if (ret != -EPROBE_DEFER)
-			dev_err(&pdev->dev, "failed to get ipg clk: %d\n", ret);
-		return ret;
-	}
+	if (IS_ERR(data->ipg_clk))
+		return dev_err_probe(&pdev->dev, PTR_ERR(data->ipg_clk),
+				     "failed to get ipg clk\n");
 
 	data->channum = channum;
 	raw_spin_lock_init(&data->lock);