NX842 compression test using zram
NX842 compression test using zram

Create a small filesystem on a zram device, checking we appear to use the
NX device.

We don't really have a good way as of yet to ensure we actually end
up using the hardware rather than the software though.

This should be enough for a smoke test however.

Signed-off-by: Stewart Smith <ec31ab75ddf977353c8f660f92ea8b23f64aef25@linux.vnet.ibm.com>

open-power/op-test-framework,open-power/op-test-framework,open-power/op-test-framework