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: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>