in the case of HAVE_CAMV4L2 && !HAVE_CAMV4L there was no body for the if
statement.

they are upstream since at least linux 2.6.8 (10 Years)
http://lxr.oss.org.cn/ident?v=2.6.8&i=V4L2_PIX_FMT_SBGGR8

do not use a custom enum instead of the V4L2 fourcc defines for palette.
This way we can easily implement CAP_PROP_FOURCC and CAP_PROP_MODE.

use logic similar to cap_libv4l: replace icvSetVideoSize by v4l2_reset
as it was not used for V4L1, the actual frame format is negotiated in
try_palette_v4l2 and the stream has to restarted anyway.

now icvGetPropertyCAM_V4L behaves the same as in cap_libv4l. This also
fixes passing boolean values.

also refactor property range handling and opencv property to V4L2
translation.

Catched on Ubuntu 12.04 with FFMPEG:
  codec:                     YES (ver 53.35.0)
  format:                    YES (ver 53.21.1)
  util:                      YES (ver 51.22.3)
  swscale:                   YES (ver 2.1.0)
  resample:                  NO
  gentoo-style:              YES

it is new'ed but never deleted. However it does not need to be global or
heap allocated in the first place.

Corrected typo and unused imports

OPENCV_IPP env var now allows to select IPP architecture level for IPP9+;
IPP initialization logic was unified across modules;