w1: small type cleanup in sysfs

On 64 bit systems, a large value for "long tmp" is truncated when
assigning to "int md->max_slave_count" so we still end up with a value
less than one despite the "tmp < 1" check.

This is more of a problem for static checkers than a real life issue,
but it's simple enough to fix.
Acked-by: NDavid Fries <david@fries.net>
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/w1/w1.c

@@ -320,10 +320,10 @@ static ssize_t w1_master_attribute_show_timeout(struct device *dev, struct devic
 static ssize_t w1_master_attribute_store_max_slave_count(struct device *dev,
 	struct device_attribute *attr, const char *buf, size_t count)
 {
-	long tmp;
+	int tmp;
 	struct w1_master *md = dev_to_w1_master(dev);
 
-	if (kstrtol(buf, 0, &tmp) == -EINVAL || tmp < 1)
+	if (kstrtoint(buf, 0, &tmp) == -EINVAL || tmp < 1)
 		return -EINVAL;
 
 	mutex_lock(&md->mutex);