cxgbe(4): Provide accurate hit count for filters on T5 cards.  The
location within the TCB and the size have both changed.

MFC after:	1 week
Relax the object locking in vm_pageout_map_deactivate_pages() and
vm_pageout_object_deactivate_pages().  A read lock suffices.

Sponsored by:	EMC / Isilon Storage Division
Add the combined (mixed) diversity support capability bit for the
AR9285/AR9485.