phy: ti: j721e-wiz: Fix return value check in wiz_probe()

In case of error, the function devm_ioremap() returns NULL pointer not
ERR_PTR(). The IS_ERR() test in the return value check should be
replaced with NULL test.

Fixes: b46f531313a4 ("phy: ti: j721e-wiz: Add support for WIZ module present in TI J721E SoC")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
diff --git a/drivers/phy/ti/phy-j721e-wiz.c b/drivers/phy/ti/phy-j721e-wiz.c
index b5f6019..7b51045d 100644
--- a/drivers/phy/ti/phy-j721e-wiz.c
+++ b/drivers/phy/ti/phy-j721e-wiz.c
@@ -794,7 +794,7 @@
 	}
 
 	base = devm_ioremap(dev, res.start, resource_size(&res));
-	if (IS_ERR(base))
+	if (!base)
 		goto err_addr_to_resource;
 
 	regmap = devm_regmap_init_mmio(dev, base, &wiz_regmap_config);