MFC r329855

MFC r329855
  1. Added support to offline a port if is error recovery on successful.
  2. Sysctls to enable/disable driver_state_dump and error_recovery.
  3. Sysctl to control the delay between hw/fw reinitialization and
     restarting the fastpath.
  4. Stop periodic stats retrieval if interface has IFF_DRV_RUNNING flag off.
  5. Print contents of PEG_HALT_STATUS1 and PEG_HALT_STATUS2 on heartbeat
     failure.
  6. Speed up slowpath shutdown during error recovery.
  7. link_state update using atomic_store.
  8. Added timestamp information on driver state and minidump captures.
  9. Added support for Slowpath event logging
  10.Added additional failure injection types to simulate failures.

git-svn-id: svn://svn.freebsd.org/base/stable/9@330557 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f