Move management of the bintool to compress and decompress data into the
entry class and add the bintool to the list of required bintools.

Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

Remove the obsolete compressed data header handling from the utilities
to compress and decompress data. The header is uncommon, not supported
by U-Boot and incompatible with external compressed artifacts.

Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

Drop the unused gzip code, update comments and add a test for an
invalid algorithm. The temporary file is not needed now, so drop that
also.

Signed-off-by: Simon Glass <sjg@chromium.org>

Update the code to use this bintool, instead of running lzma_alone
directly. This simplifies the code and provides more consistency.

Signed-off-by: Simon Glass <sjg@chromium.org>

Update the code to use this bintool, instead of running lz4 directly. This
simplifies the code and provides more consistency.

Signed-off-by: Simon Glass <sjg@chromium.org>

Tweak some naming and comments to resolve these. Use WriteFile() to write
the file.

Signed-off-by: Simon Glass <sjg@chromium.org>

The compression functions are not actually used by patman, so we don't
need then in the tools module. Also we want to change them to use
bintools, which patman will not support.

Move these into a new comp_util module, within binman.

Signed-off-by: Simon Glass <sjg@chromium.org>