fs: squashfs: port lzo compression support from kernel ...

This ports lzo_wrapper from kernel code and adds some minimal adaptions
to make squashfs lzo compression work in barebox.

Signed-off-by: Enrico Jorns <ejo@pengutronix.de>
Tested-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>