kbd: use zlib to decompress files

kbd: use zlib to decompress files

Upstream used zlib to decompress files [1], add PACKAGECONFIG
zlib to avoid host contamination.

Backport a patch from upstream [2] to fix compile failure while
zlib is used

[1] https://git.kernel.org/pub/scm/linux/kernel/git/legion/kbd.git/commit/?id=7fdd8debe37ae52812b77d82e08713bd62c607f4
[2] https://github.com/legionus/kbd/commit/2f9a4e56c2ef245fbe840677aad9d5932e17f50d

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>