common/octeontx2: add uplink message support

common/octeontx2: add uplink message support

The events like PHY link status change by AF or PHY configuration
change by PF would call for the uplink message.
The AF initiated uplink would land it in PF and PF would further
forward to VF(if it is intended for that specific VF)

The PF initiated uplink would be distributed to all active VFs.
This patch adds support for the same.

Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
Signed-off-by: Harman Kalra <hkalra@marvell.com>