net: mana: Allocate MSI-X vectors dynamically

JIRA: https://issues.redhat.com/browse/RHEL-109583

commit 7553911
Author: Shradha Gupta <shradhagupta@linux.microsoft.com>
Date:   Wed Jun 11 07:11:13 2025 -0700

    net: mana: Allocate MSI-X vectors dynamically

    Currently, the MANA driver allocates MSI-X vectors statically based on
    MANA_MAX_NUM_QUEUES and num_online_cpus() values and in some cases ends
    up allocating more vectors than it needs. This is because, by this time
    we do not have a HW channel and do not know how many IRQs should be
    allocated.

    To avoid this, we allocate 1 MSI-X vector during the creation of HWC and
    after getting the value supported by hardware, dynamically add the
    remaining MSI-X vectors.

    Signed-off-by: Shradha Gupta <shradhagupta@linux.microsoft.com>
    Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>

Conflicts: oo backport of 'net: mana: Add handler for hardware servicing events'

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>

Author: Maxim Levitsky