ALSA: firewire-lib: remove rx_blocks_for_midi quirk

There are several devices that expect to receive MIDI data only in the
first eight data blocks of a packet.  If the driver restricts the data
rate to the allowed rate (as mandated by the specification, but not yet
implemented by this driver), this happens naturally.  Therefore, there
is no reason to ever try to use more data packets with any device.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
ALSA: firewire-lib: limit the MIDI data rate

Do no send MIDI bytes at the full rate at which FireWire packets happen
to be sent, but restrict them to the actual rate of a real MIDI port.
This is required by the specification, and prevents data loss when the
device's buffer overruns.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
oxfw: improve codes according to maintainer's advices

[alsa-devel] [PATCH 25/29] ALSA: oxfw: Add support for Behringer/Mackie devices
http://mailman.alsa-project.org/pipermail/alsa-devel/2014-November/084174.html

[alsa-devel] [PATCH 26/29] ALSA: oxfw: Add support AMDTP in-stream
http://mailman.alsa-project.org/pipermail/alsa-devel/2014-November/084175.html