ste_dma40: Delete another unnecessary check in d40_probe()

A single jump label was used by the d40_probe() function in several cases
for error handling which was a bit inefficient here.

* This implementation detail could be improved by the introduction
  of another jump label.

* Remove an extra check for the variable "base".

* Omit its explicit initialisation at the beginning then.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/ste_dma40.c

@@ -3543,7 +3543,7 @@ static int __init d40_probe(struct platform_device *pdev)
 	struct stedma40_platform_data *plat_data = dev_get_platdata(&pdev->dev);
 	struct device_node *np = pdev->dev.of_node;
 	int ret = -ENOENT;
-	struct d40_base *base = NULL;
+	struct d40_base *base;
 	struct resource *res = NULL;
 	int num_reserved_chans;
 	u32 val;
@@ -3552,17 +3552,17 @@ static int __init d40_probe(struct platform_device *pdev)
 		if (np) {
 			if (d40_of_probe(pdev, np)) {
 				ret = -ENOMEM;
-				goto failure;
+				goto report_failure;
 			}
 		} else {
 			d40_err(&pdev->dev, "No pdata or Device Tree provided\n");
-			goto failure;
+			goto report_failure;
 		}
 	}
 
 	base = d40_hw_detect_init(pdev);
 	if (!base)
-		goto failure;
+		goto report_failure;
 
 	num_reserved_chans = d40_phy_res_init(base);
 
@@ -3693,7 +3693,6 @@ static int __init d40_probe(struct platform_device *pdev)
 	return 0;
 
 failure:
-	if (base) {
 	kmem_cache_destroy(base->desc_slab);
 	if (base->virtbase)
 		iounmap(base->virtbase);
@@ -3735,8 +3734,7 @@ static int __init d40_probe(struct platform_device *pdev)
 	kfree(base->lookup_phy_chans);
 	kfree(base->phy_res);
 	kfree(base);
-	}
-
+report_failure:
 	d40_err(&pdev->dev, "probe failed\n");
 	return ret;
 }