Merge branch 'smc-rv23'

Karsten Graul says:

====================
net/smc: introduce SMC-Rv2 support

Please apply the following patch series for smc to netdev's net-next tree.

SMC-Rv2 support (see https://www.ibm.com/support/pages/node/6326337)
provides routable RoCE support for SMC-R, eliminating the current
same-subnet restriction, by exploiting the UDP encapsulation feature
of the RoCE adapter hardware.

v2: resend of the v1 patch series, and CC linux-rdma this time
v3: rebase after net tree was merged into net-next
====================

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