eeepc-laptop: check the 3G rfkill state on resume

All the rfkill devices are treated as "persistent", 3G is no exception.
This means their state may change over hibernation.

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>