vDPA/ifcvf: decouple config/dev IRQ requester and vectors allocator from the adapter

vDPA/ifcvf: decouple config/dev IRQ requester and vectors allocator from the adapter

commit 842b2f141fd9f1fec226a0b5b2bc888277364141 upstream.

This commit decouples the config irq requester, the device
shared irq requester and the MSI vectors allocator from
the adapter. So they can be safely invoked since probe
before the adapter is allocated.

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Cc: stable@vger.kernel.org
Message-Id: <20221125145724.1129962-8-lingshan.zhu@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>