octeontx2-af: Config pkind for CGX mapped PFs

For each CGX LMAC that is mapped to a RVU PF, allocate
a pkind and config the same in CGX. For a received packet
at CGX LMAC interface this pkind is used by NPC block
to start parsing of packet.

Signed-off-by: Geetha sowjanya <gakula@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>