snd-dice: add driver for TC Applied Technologies' DICE FireWire sound cards

Worked by Ladish Clemans and Robert von Chamier.

Currently make is failed because of API differences. Their source has header
files which should be shared between user and kernel land. But currently it's
in dice directory.
snd-dice: modify so that make runs successfully

The snd-firewire-lib in this repository don't consider about the number of
channels for PCM and MIDI at all because it has no responsibility to packetize
each data blocks. Then each driver has the responsibility.

This commit just make it possible to make all drivers in this repository so
snd-dice will not work well.

I hope someone to modify snd-dice referring to my comments.