m8: enable lz4 compression

* also add /proc/config.gz support

Change-Id: Iaccdc00fb0fc821ee29888dfe3ef74ea95bb374a
arm: lz4: faster boot-up process.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: flar2 <asegaert@gmail.com>