classify: use clib_crc32c on supporting uarch
classify: use clib_crc32c on supporting uarch

Use clib_crc32c in place of clib_xxhash on supporting uarch.

Type: improvement

Signed-off-by: Ray Kinsella <64a50932049ddff830412e0fd9edb30198bf17f3@ashroe.eu>
Change-Id: Icdfb4ffa92c2c9e7aebc3ec99f20e91392a103ab

chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp