pwc: Add support for control events (v2)

Hi Mauro,

Please pull from my tree to add support for control events to the pwc driver. Note that this patch depends upon the patches from hverkuils poll tree (and those patches are thus also in my tree, but not part of this pull req).

The following changes since commit 30178e8623281063c18592a848cdcd71f78f603d:

vivi: let vb2_poll handle events. (2011-07-18 13:07:28 +0200)

are available in the git repository at:
git://linuxtv.org/hgoede/gspca.git media-for_v3.1

Hans de Goede (2):
pwc: Add support for control events
pwc: properly mark device_hint as unused in all probe error paths

 drivers/media/video/pwc/pwc-if.c  |   79 ++++++++++++++----------------------
 drivers/media/video/pwc/pwc-v4l.c |   16 ++++++-
 drivers/media/video/pwc/pwc.h     |    4 ++
 3 files changed, 48 insertions(+), 51 deletions(-)

Regards,

Hans