ACPI: platform_profile: Notify change events on register and unregister

As multiple platform profile handlers may come and go, send a notification
to userspace each time that a platform profile handler is registered or
unregistered.

Reviewed-by: Armin Wolf <W_Armin@gmx.de>
Tested-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Tested-by: Matthew Schwartz <matthew.schwartz@linux.dev>
Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20241206031918.1537-15-mario.limonciello@amd.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

drivers/acpi/platform_profile.c

@@ -361,6 +361,8 @@ int platform_profile_register(struct platform_profile_handler *pprof)
 		goto cleanup_ida;
 	}
 
+	sysfs_notify(acpi_kobj, NULL, "platform_profile");
+
 	cur_profile = pprof;
 
 	err = sysfs_update_group(acpi_kobj, &platform_profile_group);
@@ -391,6 +393,8 @@ int platform_profile_remove(struct platform_profile_handler *pprof)
 	device_unregister(pprof->class_dev);
 	ida_free(&platform_profile_ida, id);
 
+	sysfs_notify(acpi_kobj, NULL, "platform_profile");
+
 	sysfs_update_group(acpi_kobj, &platform_profile_group);
 
 	return 0;