octeontx2-af: fix CPT FLT handler

commit 2fe7a9f728ca3de2e711cae25c4ca72494e1a39d from
git@git.assembla.com:cavium/WindRiver.linux.git

This patch changes the code to have separate handler for each FLT
interrupt vector instead of having one handler for all FLT vectors.
This patch also adds code to recover multiple engines.

Signed-off-by: Srujana Challa <schalla@marvell.com>
Change-Id: I5a40f471444c8d135f9be75c33e74a35c9aba63c
Reviewed-on: https://sj1git1.cavium.com/c/IP/SW/kernel/linux/+/86209


Tested-by: sa_ip-sw-jenkins <sa_ip-sw-jenkins@marvell.com>
Reviewed-by: Nithin Kumar Dabilpuram <ndabilpuram@marvell.com>
Reviewed-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
Signed-off-by: Ruiqiang Hao <Ruiqiang.Hao@windriver.com>