octeontx2-af: cn10k: Mailbox changes for CN10K CPT

Adds changes to existing CPT mailbox messages to support
CN10K CPT block. This patch also adds new register defines
for CN10K CPT.

Signed-off-by: Vidya Sagar Velumuri <vvelumuri@marvell.com>
Signed-off-by: Srujana Challa <schalla@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>