[patch] Video4Linux HAL class

[Matthew Mastracci]

The attached patch + new files adds virtual video4linux class devices to
the HAL tree (and fixes a small bug with the i2c adapters not being
removed properly on hotplug remove).  The V4L devices add the following
multimedia capabilities to their parent device (ie: a bttv-based tv
capture card):

V4L Device | Capability       | Name
radio      | multimedia.radio | Video4Linux Radio Interface
video      | multimedia.vidio | Video4Linux Video Input Interface
vbi        | multimedia.vbi   | Video4Linux VBI Interface
vout       | multimedia.vout  | Video4Linux Video Output Interface

Note that multimedia.vout is different than video.* - v4l video out
devices are accessed through the v4l API.  

-- 
Matthew Mastracci <matt at aclaro.com>
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