Use the same timeout parameters for BIO_FLUSH as with the other commands.
Use the same timeout parameters for BIO_FLUSH as with the other commands.

This workaround the problem in Parallels/VMWare where the emulated drivers are
slower, especially with ATA_FLUSHCACHE.  The problem appears much more
frequently with ZFS which use it a lot more.

Approved:	sos, pjd

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