Add statistics for compression/decompression hardware offload
under debugfs.
Signed-off-by: NMahipal Challa <Mahipal.Challa@cavium.com>
Signed-off-by: NJan Glauber <jglauber@cavium.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>