power_supply: Fix sysfs format warning

Fix format warning:

drivers/power/power_supply_sysfs.c:82: warning: format '%d' expects type 'int', but argument 4 has type 'ssize_t'
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>

drivers/power/power_supply_sysfs.c

@@ -77,7 +77,7 @@ static ssize_t power_supply_show_property(struct device *dev,
 			dev_dbg(dev, "driver has no data for `%s' property\n",
 				attr->attr.name);
 		else if (ret != -ENODEV)
-			dev_err(dev, "driver failed to report `%s' property: %d\n",
+			dev_err(dev, "driver failed to report `%s' property: %zd\n",
 				attr->attr.name, ret);
 		return ret;
 	}