dnyarri-kconf: Re-enable multiple devpts instances.

I'm not sure how I've managed to drop this option, but I somehow must
have been sleep deprived in d2e089ac7fd74d436eda0885f8cd4a56ff20f91e.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
Update kernel source and configs to v3.17.0.

I'm not quite sure why dnyarri's kconf got so out of sync, but this
includes the changes from "make oldconfig".

Signed-off-by: aszlig <aszlig@redmoonstudios.org>