regulator: max8997: Test pdata by NULL checking instead of IS_ERR_OR_NULL

pdata is either a valid pointer or NULL, use NULL checking rather than
IS_ERR_OR_NULL macro.

Signed-off-by: Axel Lin <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

drivers/regulator/max8997.c

···
 	int i, ret, size, nr_dvs;
 	u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0;
 
-	if (IS_ERR_OR_NULL(pdata)) {
-		dev_err(pdev->dev.parent, "No platform init data supplied.\n");
+	if (!pdata) {
+		dev_err(&pdev->dev, "No platform init data supplied.\n");
 		return -ENODEV;
 	}