Return detailed error code at wpas_p2p_mac_setup

Change wpas_p2p_mac_setup to return internal function's error code
when error occurs, not returning just -EINVAL.

Bug: 235182238
Test: After apply ag/19035853 and ag/19212748 and this,
        atest VtsHalWifiSupplicantP2pIfaceTargetTest
Change-Id: I81a07d7cb0772aee72c45509298cc7aad646be20
1 file changed