crypto/octeontx: enable unbinding

crypto/octeontx: enable unbinding

Like for Ethernet ports, the OCTEON TX crypto engines must
first be unbound from their kernel module, then rebound to
vfio-pci, before being used in DPDK.

As this capability is detected at runtime by dpdk-pmdinfo,
add the info in the PMD registering directives.

Then an external script can be used for bind and unbind.

Fixes: bfe2ae495ee2 ("crypto/octeontx: add PMD skeleton")
Cc: stable@dpdk.org
Signed-off-by: Thierry Herbelot <thierry.herbelot@6wind.com>
Acked-by: Anoob Joseph <anoobj@marvell.com>