pci/shpc: refactor shpc_device_plug_common()

Rename it to shpc_device_get_slot(), to mention what it does rather
than how it is used. It also helps to reuse it in further commit.

Also, add a return value and get rid of local_err.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Anton Kuchin <antonkuchin@yandex-team.ru>
Message-Id: <20230216180356.156832-7-vsementsov@yandex-team.ru>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
1 file changed