MFC 290416:

MFC 290416:
Chelsio T5 chips do not properly echo the No Snoop and Relaxed Ordering
attributes when replying to a TLP from a Root Port.  As a workaround,
disable No Snoop and Relaxed Ordering in the Root Port of each T5 adapter
during attach so that CPU-initiated requests do not contain these flags.

Note that this affects CPU-initiated requests to all devices under this
root port.

Sponsored by:	Chelsio

git-svn-id: svn://svn.freebsd.org/base/stable/10@291083 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f