Merge branch 'mlxsw-updates'

Ido Schimmel says:

====================
mlxsw: Various updates

Patches #1-#3 add missing topology diagrams in selftests and perform
small cleanups.

Patches #4-#5 make small adjustments in QoS configuration. See detailed
description in the commit messages.

Patches #6-#8 reduce the number of background EMAD transactions. The
driver periodically queries the device (via EMAD transactions) about
updates that cannot happen in certain situations. This can negatively
impact the latency of time critical transactions, as the device is busy
processing other transactions.

Before:

 # perf stat -a -e devlink:devlink_hwmsg -- sleep 10

  Performance counter stats for 'system wide':

                452      devlink:devlink_hwmsg

       10.009736160 seconds time elapsed

After:

 # perf stat -a -e devlink:devlink_hwmsg -- sleep 10

  Performance counter stats for 'system wide':

                  0      devlink:devlink_hwmsg

       10.001726333 seconds time elapsed

====================

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