stp: wait until IPA handshake is done in f_connect_ipa

Otherwise when trying to send stuff to an IPA ASP in some test, it may
fail because the ASP is till not active in the STP (because IPA
handshake was yet not finished, race condition).

Change-Id: I8ea11fe331baf2b65ce0b7b3c1a2b480332faa2a
1 file changed