eeepc-wmi: add touchpad led support

Most of the code comes from eeepc-laptop.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 65ba620..adcdbbd 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -426,6 +426,8 @@
 	depends on EXPERIMENTAL
 	depends on BACKLIGHT_CLASS_DEVICE
 	select INPUT_SPARSEKMAP
+	select LEDS_CLASS
+	select NEW_LEDS
 	---help---
 	  Say Y here if you want to support WMI-based hotkeys on Eee PC laptops.