asus-laptop: use select instead of depends on

Like thinkpad_acpi or eeepc-laptop, asus-laptop will
now use "select" instead of "depends on"
for LEDS_CLASS, NEW_LEDS and BACKLIGHT_CLASS_DEVICE
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/platform/x86/Kconfig

@@ -39,9 +39,9 @@ config ASUS_LAPTOP
 	tristate "Asus Laptop Extras (EXPERIMENTAL)"
 	depends on ACPI
 	depends on EXPERIMENTAL && !ACPI_ASUS
-	depends on LEDS_CLASS
-	depends on NEW_LEDS
-	depends on BACKLIGHT_CLASS_DEVICE
+	select LEDS_CLASS
+	select NEW_LEDS
+	select BACKLIGHT_CLASS_DEVICE
 	depends on INPUT
 	---help---
 	  This is the new Linux driver for Asus laptops. It may also support some