For SR-IOV, the IP discovery revision number encodes
additional information.  Handle that case here.

v2: drop additional IP versions
Reviewed-by: NGuchun Chen <guchun.chen@amd.com>
Acked-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>