octeon: fix link down issue

octeon: fix link down issue

An issue is noticed when the link state of the ethernet interface is
toggled to down and again brought up. The link status shows "up" in the
"show interface", but shows "down" in "show hardware-interface".
This issue does not occur when the link is brought up for the first
time, but only manifests when the interface is brought down and up again.

This happens because the device status and VNET_HW_INTERFACE_FLAG_LINK_UP
aren't correctly updated during the port stop, preventing them from
being updated during the port start.

This patch fixes this issue in the port stop function.

Type: fix
Fixes: 01fe7ab88e

Signed-off-by: Alok Mishra <[email protected]>
Change-Id: Idbc5a6c31409a3d1c5b19e14a3c9509291175677