fw_cfg: fw_cfg is a singleton
Make sure we only have a single instance ever:
because if it isn't we can't find it so it's
useless anyway.
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
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Make sure we only have a single instance ever:
because if it isn't we can't find it so it's
useless anyway.
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>