Update skate configs for new zram

Also disable cleancache. This is active only when zcache is used,
and no previous build ever had zcache active (it needed a cmdline
parameter of "zcache" to activate). I already tested with zcache
active, and the driver doesn't function properly.

Frontswap also has the same problem, but disabling it via the
config will cause build errors. Will fix/remove these drivers
properly later.

Change-Id: Icb74e4414b9bc051b39eb92bf6c621b14f943cfc