ACPI: Schedule /proc/acpi/event for removal

Schedule /proc/acpi/event for removal in 6 months.

Re-name acpi_bus_generate_event() to acpi_bus_generate_proc_event()
to make sure there is no confusion that it is for /proc/acpi/event only.

Add CONFIG_ACPI_PROC_EVENT to allow removal of /proc/acpi/event.
There is no functional change if CONFIG_ACPI_PROC_EVENT=y

Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index dbc2e5d..e944aae 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -698,7 +698,7 @@
 	switch (event) {
 	case ACPI_PROCESSOR_NOTIFY_PERFORMANCE:
 		acpi_processor_ppc_has_changed(pr);
-		acpi_bus_generate_event(device, event,
+		acpi_bus_generate_proc_event(device, event,
 					pr->performance_platform_limit);
 		acpi_bus_generate_netlink_event(device->pnp.device_class,
 						  device->dev.bus_id, event,
@@ -706,13 +706,13 @@
 		break;
 	case ACPI_PROCESSOR_NOTIFY_POWER:
 		acpi_processor_cst_has_changed(pr);
-		acpi_bus_generate_event(device, event, 0);
+		acpi_bus_generate_proc_event(device, event, 0);
 		acpi_bus_generate_netlink_event(device->pnp.device_class,
 						  device->dev.bus_id, event, 0);
 		break;
 	case ACPI_PROCESSOR_NOTIFY_THROTTLING:
 		acpi_processor_tstate_has_changed(pr);
-		acpi_bus_generate_event(device, event, 0);
+		acpi_bus_generate_proc_event(device, event, 0);
 		acpi_bus_generate_netlink_event(device->pnp.device_class,
 						  device->dev.bus_id, event, 0);
 	default: