[gst-plugins-good] Add support for UYVY format

As discussed [1], gstreamer should recognize UYVY format.  Likewise, the
ISP for OMAP3 should report the formats it supports.  These patches are
something of a hack but enable the Caspa camera to work with gstreamer.

Thanks to [2] for the patches.

[1] http://gumstix.8.x6.nabble.com/Re-e-con-camera-modules-td2521910.html
[2] https://github.com/strassek/meta-meson/tree/master/recipes-multimedia/gstreamer

Signed-off-by: Ash Charles <ashcharles@gmail.com>