octeontx2-af: Send Link events one by one

Send link events one after another otherwise new message
is overwriting the message which is being processed by PF.

Fixes: a88e0f93 ("octeontx2: Detect the mbox up or down message via register")
Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/1747823443-404-1-git-send-email-sbhatta@marvell.com


Signed-off-by: Paolo Abeni <pabeni@redhat.com>