Do not compile deleted kernel modules

This disables building for many modules which are deleted as part of the build process. As a side effect certain modules which were being built are also no longer built:

`drivers/net/wireless/*`: no wireless networking, so unneeded
`drivers/bluetooth/*`: requires deleted `bluetooth.ko`
`hid-prodikeys`: requires deleted `soundcore.ko`
`wm97xx-ts`: requires deleted `sound/ac97_bus.ko`
`6lowpan_iphc`: Another wireless networking module
`nfsd`: Kconfig specifies this relies on `sunrpc`, which is deleted (although it does `modprobe` without)

The size of the distribution is reduced by approx 2MB. A complete list of all modules this patch removes from the distribution is at https://gist.github.com/theospears/f30f27bf23550888e940