Various warnings fixed (unused-variable)

Signed-off-by: ptmr3 <ptmr323@gmail.com>
Exp. Edits
wm8994: fixing HDMI audio streaming

this should fix it (as we have the same audio chip as the N10)
ALSA: usb-audio: Avoid autopm calls after disconnection
ALSA: usb-audio: Fix missing autopm for MIDI input
ALSA: ua101, usx2y: fix broken MIDI output
More Midi.c
More Midi.c 2
Last One (Midi.c)
Linux 3.0.62
Linux 3.0.63
Linux 3.0.64