Merge branch 'thunderbolt-end-to-end-flow-control'

Mika Westerberg says:

====================
thunderbolt: net: Enable full end-to-end flow control

Thunderbolt/USB4 host controllers support full end-to-end flow control
that prevents dropping packets if there are not enough hardware receive
buffers. So far it has not been enabled for the networking driver yet
but this series changes that. There is one snag though: the second
generation (Intel Falcon Ridge) had a bug that needs special quirk to
get it working. We had that in the early stages of the Thunderbolt/USB4
driver but it got dropped because it was not needed at the time. Now we
add it back as a quirk for the host controller (NHI).

The first patch of this series is a bugfix that I'm planning to push for
v6.0-rc. Rest are v6.1 material. This also includes a patch that shows
the XDomain link type in sysfs the same way we do for USB4 routers and
updates the networking driver module description.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>