lib: Add CRC64 ECMA module

lib: Add CRC64 ECMA module

Add implementation of CRC64 ECMA checksum.

We have an IP Acceleration driver for Freescale network processors which
is using this CRC64.  However, it still needs some work in order for it to
become upstreamable.

Signed-off-by: Marian Chereji <marian.chereji@freescale.com>
Reviewed-by: Varvara Andrei-B21317 <andrei.varvara@freescale.com>
Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>