aries | p1: enable lz4 [de]compress for zram

Introduce LZ4 compression backend and make it available for selection.
LZ4 support is optional and requires user to set ZRAM_LZ4 config option.
The default compression backend is ZRAM_LZO.

Signed-off-by: Humberto Borba <humberos@gmail.com>
Change-Id: I1f394e0e6ba274a79924c2f272ae661a7a3d53ae