dice: remove experimental state

Some developers test this driver, thus it's better to remove its
experimental state.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
dice: fix failure to destroy streams when one stream is initialized only

Just because of my mistake.
dice: support playback or capture only models
dice: remove needless blank line
firewire-lib: Add sorting in-packets for full duplex streams with sync

In full duplex streams with synchronization, consistency of SYT field in
in-packets is important for out-packets. This commit add sorting in-packets
according to the value of dbc.