s390/dasd: use default_groups in kobj_type

There are currently 2 ways to create a set of sysfs files for a
kobj_type, through the default_attrs field, and the default_groups
field.  Move the s390 dasd sysfs code to use default_groups field
which has been the preferred way since commit aa30f47 ("kobject:
Add support for default attribute groups to kobj_type") so that we can
soon get rid of the obsolete default_attrs field.

Cc: Stefan Haberland <sth@linux.ibm.com>
Cc: Jan Hoeppner <hoeppner@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20220106095401.3274637-1-gregkh@linuxfoundation.org
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

drivers/s390/block/dasd_devmap.c

@@ -1824,10 +1824,11 @@ static struct attribute *paths_info_attrs[] = {
 	&path_fcs_attribute.attr,
 	NULL,
 };
+ATTRIBUTE_GROUPS(paths_info);
 
 static struct kobj_type path_attr_type = {
 	.release	= dasd_path_release,
-	.default_attrs	= paths_info_attrs,
+	.default_groups	= paths_info_groups,
 	.sysfs_ops	= &kobj_sysfs_ops,
 };