Import png source for images, extracted from headers

The prefered form for manipulating an image is the PNG source from
which the C code was generated.  These PNG were extracted by feeding
data from the C headers to libpng.

Signed-off-by: Yann Dirson <yann@blade-group.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>