regulator: arizona-micsupp: Remove redundant error message

kzalloc prints its own OOM message upon failure.

Signed-off-by: Sachin Kamat <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

drivers/regulator/arizona-micsupp.c

···
 	int ret;
 
 	micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);
-	if (micsupp == NULL) {
-		dev_err(&pdev->dev, "Unable to allocate private data\n");
+	if (!micsupp)
 		return -ENOMEM;
-	}
 
 	micsupp->arizona = arizona;
 	INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp);