platform/x86: depends instead of select for laptop platform drivers

"I hate `select' and will gleefully leap on any s/select/depends/ patch,
whether it works or not :)"
  Andrew Morton

select INPUT is not needed here, because if someone doesn't want INPUT,
he won't want these drivers either.
Signed-off-by: NCorentin Chary <corentincj@iksaif.net>
Signed-off-by: NLen Brown <len.brown@intel.com>

drivers/platform/x86/Kconfig

@@ -185,11 +185,11 @@ config SONYPI_COMPAT
 config THINKPAD_ACPI
 	tristate "ThinkPad ACPI Laptop Extras"
 	depends on ACPI
+	depends on INPUT
 	select BACKLIGHT_LCD_SUPPORT
 	select BACKLIGHT_CLASS_DEVICE
 	select HWMON
 	select NVRAM
-	select INPUT
 	select NEW_LEDS
 	select LEDS_CLASS
 	select NET