ACPI: TAD: Use __ATTRIBUTE_GROUPS() macro

Recent commit 93afe8b ("ACPI: TAD: Use dev_groups in struct
device_driver") switched over the ACPI TAD driver to using device
attribute groups instead of creating and removing the device sysfs
attributes directly, but it might go one step farther and use the
__ATTRIBUTE_GROUPS() macro which would reduce the code size slightly.

Do it now.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
[ rjw: Fixed typo in the changelog ]
Link: https://patch.msgid.link/1961102.tdWV9SEqCh@rafael.j.wysocki
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Author: rafaeljw

drivers/acpi/acpi_tad.c

@@ -605,15 +605,12 @@ static umode_t acpi_tad_attr_is_visible(struct kobject *kobj,
 	return 0;
 }
 
-static const struct attribute_group acpi_tad_attr_group = {
+static const struct attribute_group acpi_tad_group = {
 	.attrs	= acpi_tad_attrs,
 	.is_visible = acpi_tad_attr_is_visible,
 };
 
-static const struct attribute_group *acpi_tad_attr_groups[] = {
-	&acpi_tad_attr_group,
-	NULL,
-};
+__ATTRIBUTE_GROUPS(acpi_tad);
 
 #ifdef CONFIG_RTC_CLASS
 /* RTC class device interface */
@@ -885,7 +882,7 @@ static struct platform_driver acpi_tad_driver = {
 	.driver = {
 		.name = "acpi-tad",
 		.acpi_match_table = acpi_tad_ids,
-		.dev_groups = acpi_tad_attr_groups,
+		.dev_groups = acpi_tad_groups,
 	},
 	.probe = acpi_tad_probe,
 	.remove = acpi_tad_remove,