firewire-lib: Fix wrong label for 16 bits Raw Audio data

According to IEC 61883-1:2000, VBL (Valid Bit Length) code for 16 bits
raw audio data is 0x02 so the label should be 0x42.
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.