eeprom: idt_89hpesx: clean up an error pointer vs NULL inconsistency

We check for IS_ERR_OR_NULL() here, but later we check the same thing
for NULL only.  It turns out that it can only be NULL so we can make the
checking consistent by removing the ERR_PTR stuff.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/eeprom/idt_89hpesx.c

@@ -1128,7 +1128,7 @@ static void idt_get_fw_data(struct idt_89hpesx_dev *pdev)
 
 	device_for_each_child_node(dev, fwnode) {
 		ee_id = idt_ee_match_id(fwnode);
-		if (IS_ERR_OR_NULL(ee_id)) {
+		if (!ee_id) {
 			dev_warn(dev, "Skip unsupported EEPROM device");
 			continue;
 		} else