Revert "snd-firewire-lib: add MIDI quirk for Echo Fireworks"

This reverts commit cd6746aba34e11c3cf1b2db52c35b9f42d26afc5.
snd-firewire-lib: add MIDI quirk for Echo Fireworks

Echo Fireworks ignores MIDI messages in greater than 8 data blocks in an AMDTP
packet. This commit add a quirk for this issue to add 'blocks_for_midi' member
in 'struct amdtp_stream'.

As a default, this member is set as INT_MAX. Then whole data blocks in an AMDTP
packet can include MIDI messages. When this is set 'n', first 'n' data blocks
in an AMDTP packet can include MIDI messages.