ACPI: don't duplicate input events on netlink

The previous events patch added a netlink event for every
user of the legacy /proc/acpi/event interface.

However, some users of /proc/acpi/event are really input events,
and they already report their events via the input layer.

Introduce a new interface, acpi_bus_generate_netlink_event(),
which is explicitly called by devices that want to repoprt
events via netlink.  This allows the input-like events
to opt-out of generating netlink events.  In summary:

events that are sent via netlink:
	ac/battery/sbs
	thermal
	processor
	thinkpad_acpi dock/bay

events that are sent via input layer:
	button
	video hotkey
	thinkpad_acpi hotkey
	asus_acpi/asus-laptop hotkey
	sonypi/sonylaptop

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 1e06159..291758c 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -487,6 +487,10 @@
 	       KELVIN_TO_CELSIUS(tz->temperature));
 	acpi_bus_generate_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL,
 				tz->trips.critical.flags.enabled);
+	acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
+					  tz->device->dev.bus_id,
+					  ACPI_THERMAL_NOTIFY_CRITICAL,
+					  tz->trips.critical.flags.enabled);
 
 	orderly_poweroff(true);
 
@@ -506,6 +510,10 @@
 
 	acpi_bus_generate_event(tz->device, ACPI_THERMAL_NOTIFY_HOT,
 				tz->trips.hot.flags.enabled);
+	acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
+					  tz->device->dev.bus_id,
+					  ACPI_THERMAL_NOTIFY_HOT,
+					  tz->trips.hot.flags.enabled);
 
 	/* TBD: Call user-mode "sleep(S4)" function */
 
@@ -1150,11 +1158,15 @@
 		acpi_thermal_get_trip_points(tz);
 		acpi_thermal_check(tz);
 		acpi_bus_generate_event(device, event, 0);
+		acpi_bus_generate_netlink_event(device->pnp.device_class,
+						  device->dev.bus_id, event, 0);
 		break;
 	case ACPI_THERMAL_NOTIFY_DEVICES:
 		if (tz->flags.devices)
 			acpi_thermal_get_devices(tz);
 		acpi_bus_generate_event(device, event, 0);
+		acpi_bus_generate_netlink_event(device->pnp.device_class,
+						  device->dev.bus_id, event, 0);
 		break;
 	default:
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO,