hwmon: (pmbus) Replace - with _ in device names before registration

The hwmon sysfs ABI requires that the `name` property doesn't include
any dashes. But when the pmbus code picks the name up from the device
tree it quite often does. Replace '-' with '_' before registering the
device.
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Link: https://lore.kernel.org/r/20210317040231.21490-2-chris.packham@alliedtelesis.co.nzSigned-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/pmbus/pmbus_core.c

@@ -2568,6 +2568,7 @@ int pmbus_do_probe(struct i2c_client *client, struct pmbus_driver_info *info)
 	struct pmbus_data *data;
 	size_t groups_num = 0;
 	int ret;
+	char *name;
 
 	if (!info)
 		return -ENODEV;
@@ -2617,10 +2618,15 @@ int pmbus_do_probe(struct i2c_client *client, struct pmbus_driver_info *info)
 		return -ENODEV;
 	}
 
+	name = devm_kstrdup(dev, client->name, GFP_KERNEL);
+	if (!name)
+		return -ENOMEM;
+	strreplace(name, '-', '_');
+
 	data->groups[0] = &data->group;
 	memcpy(data->groups + 1, info->groups, sizeof(void *) * groups_num);
 	data->hwmon_dev = devm_hwmon_device_register_with_groups(dev,
-					client->name, data, data->groups);
+					name, data, data->groups);
 	if (IS_ERR(data->hwmon_dev)) {
 		dev_err(dev, "Failed to register hwmon device\n");
 		return PTR_ERR(data->hwmon_dev);