acer-wmi: build depends on i8042

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Carlos Corbacho <carlos@strangeworlds.co.uk>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/misc/Kconfig

@@ -108,6 +108,7 @@ config ACER_WMI
 	depends on ACPI
 	depends on LEDS_CLASS
 	depends on BACKLIGHT_CLASS_DEVICE
+	depends on SERIO_I8042
 	select ACPI_WMI
 	---help---
 	  This is a driver for newer Acer (and Wistron) laptops. It adds