drivers/perf: arm_dsu_pmu: Avoid duplicate printouts

platform_get_irq() already screams on failure, so the redundant call to
dev_err() can be removed.
Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Link: https://lore.kernel.org/r/20200402115940.4928-1-tangbin@cmss.chinamobile.comSigned-off-by: Will Deacon <will@kernel.org>

drivers/perf/arm_dsu_pmu.c

@@ -690,10 +690,8 @@ static int dsu_pmu_device_probe(struct platform_device *pdev)
 	}
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_warn(&pdev->dev, "Failed to find IRQ\n");
+	if (irq < 0)
 		return -EINVAL;
-	}
 
 	name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_%d",
 				PMUNAME, atomic_inc_return(&pmu_idx));