octeontx2: Re-enable FLR and MBOX interrupts

commit 748940c500679b123cda545d9fa118ecca7ad66c from
git@git.assembla.com:cavium/WindRiver.linux.git

When HWVF_RST for a VF is done by AF driver in
FLR handler then the VFs parent PF driver need to
re-enable FLR and MBOX interrupts of that VF.
This is because VF related registers in PF
register space are also cleared during HWVF_RST.

Fixes: 259c3ba4("octeontx2-af: Reset MSIX config space in FLR")
Change-Id: I3943223bbce0598c38e95136d6c2a9159608ca75
Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
Reviewed-on: https://sj1git1.cavium.com/c/IP/SW/kernel/linux/+/47501


Tested-by: sa_ip-sw-jenkins <sa_ip-sw-jenkins@marvell.com>
Reviewed-by: Sunil Kovvuri Goutham <Sunil.Goutham@cavium.com>
Signed-off-by: Ruiqiang Hao <Ruiqiang.Hao@windriver.com>