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/misc/sony-laptop.c b/drivers/misc/sony-laptop.c
index 91da688..743bd49a 100644
--- a/drivers/misc/sony-laptop.c
+++ b/drivers/misc/sony-laptop.c
@@ -904,7 +904,7 @@
 
 	dprintk("sony_acpi_notify, event: 0x%.2x\n", ev);
 	sony_laptop_report_input_event(ev);
-	acpi_bus_generate_event(sony_nc_acpi_device, 1, ev);
+	acpi_bus_generate_proc_event(sony_nc_acpi_device, 1, ev);
 }
 
 static acpi_status sony_walk_callback(acpi_handle handle, u32 level,
@@ -2292,7 +2292,7 @@
 
 found:
 	sony_laptop_report_input_event(device_event);
-	acpi_bus_generate_event(spic_dev.acpi_dev, 1, device_event);
+	acpi_bus_generate_proc_event(spic_dev.acpi_dev, 1, device_event);
 	sonypi_compat_report_event(device_event);
 
 	return IRQ_HANDLED;