w1: ds2438: changed sysfs macro for rw file

The iad sysfs file has permissions for read and write. Changed to the
recommended macro BIN_ATTR_RW.
Signed-off-by: Luiz Sampaio <sampaio.ime@gmail.com>
Link: https://lore.kernel.org/r/20210519223046.13798-4-sampaio.ime@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/w1/slaves/w1_ds2438.c

@@ -388,7 +388,7 @@ static ssize_t vdd_read(struct file *filp, struct kobject *kobj,
 	return ret;
 }
 
-static BIN_ATTR(iad, S_IRUGO | S_IWUSR | S_IWGRP, iad_read, iad_write, 0);
+static BIN_ATTR_RW(iad, 0);
 static BIN_ATTR_RO(page0, DS2438_PAGE_SIZE);
 static BIN_ATTR_RO(temperature, 0/* real length varies */);
 static BIN_ATTR_RO(vad, 0/* real length varies */);