power_supply: ab8500: 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 ab8500 power supply sysfs code to use default_groups
field which has been the preferred way since aa30f47cf6 ("kobject: Add
support for default attribute groups to kobj_type") so that we can soon
get rid of the obsolete default_attrs field.

Cc: Sebastian Reichel <sre@kernel.org>
Cc: linux-pm@vger.kernel.org
Link: https://lore.kernel.org/r/20211229140908.2523513-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/power/supply/ab8500_chargalg.c

@@ -1866,11 +1866,12 @@ static ssize_t ab8500_chargalg_sysfs_charger(struct kobject *kobj,
 	return entry->store(di, buf, length);
 }
 
-static struct attribute *ab8500_chargalg_chg[] = {
+static struct attribute *ab8500_chargalg_attrs[] = {
 	&ab8500_chargalg_en_charger.attr,
 	&ab8500_chargalg_curr_step.attr,
 	NULL,
 };
+ATTRIBUTE_GROUPS(ab8500_chargalg);
 
 static const struct sysfs_ops ab8500_chargalg_sysfs_ops = {
 	.show = ab8500_chargalg_sysfs_show,
@@ -1879,7 +1880,7 @@ static const struct sysfs_ops ab8500_chargalg_sysfs_ops = {
 
 static struct kobj_type ab8500_chargalg_ktype = {
 	.sysfs_ops = &ab8500_chargalg_sysfs_ops,
-	.default_attrs = ab8500_chargalg_chg,
+	.default_groups = ab8500_chargalg_groups,
 };
 
 /**

drivers/power/supply/ab8500_fg.c

@@ -2490,10 +2490,11 @@ static struct attribute *ab8500_fg_attrs[] = {
 	&charge_now_attr.attr,
 	NULL,
 };
+ATTRIBUTE_GROUPS(ab8500_fg);
 
 static struct kobj_type ab8500_fg_ktype = {
 	.sysfs_ops = &ab8500_fg_sysfs_ops,
-	.default_attrs = ab8500_fg_attrs,
+	.default_groups = ab8500_fg_groups,
 };
 
 /**