Compare IFF_POLLING flag with ifp->if_flags rather than ifp->if_ipending, which was almost certainly a bug since polling support was introduced in this driver.
Compare IFF_POLLING flag with ifp->if_flags rather than ifp->if_ipending,
which was almost certainly a bug since polling support was introduced
in this driver.

Found during discussion with:	mlaier

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase