Merge branch 'mlxsw-next'

Jiri Pirko says:

====================
mlxsw: Preparation for IPv4 router

Ido says:

This series prepares the driver for IPv4 router support. The router follow-up
patches are available at: https://github.com/jpirko/linux_mlxsw/tree/net-next_queue

Patches 1-9 simplify the netdevice notification block and also add several
checks during PRECHANGEUPPER events against topologies that aren't supported by
the device. This will ensure L3 interfaces are only configured on top of
valid netdevs.

Patches 10-13 contain trivial changes required for the introduction of a generic
FID struct - currently only used for vFIDs - in patch 14. Making the FID
struct generic will allow us to easily associate the underlying FIDs with
their L3-counterparts - Router interfaces (RIFs):

    FID Type        | Used by                         | RIF Type
    --------------------------------------------------------
    FID             | The VLAN-aware bridge           | VLAN
    vFID            | VLAN-unaware bridges            | FID
    rFID            | non-bridged netdevs (follow-up) | Sub-port

Obligatory ASCII art to visualize the above:

                   A.B.C.D
                      +
                      | FID RIF
                      +
                     br0                    E.F.G.H
                      +                        +
                      |                        | VLAN RIF
            +---------+---------+              +
            |                   |            br1.W
            | vFID              |              +
            |                   |              |
 vPort    +-+-+               +-+-+            +
swXpY.Z   |   |               |   |           br1
          +-+-+               +-+-+            +
            |                   |     FID=W    |
            |                   | +------------+------------+
            |                   | |                         |
        +---+---+           +---+-+-+                   +---+---+
        |       |           |       |                   |       |
        |       |           |       |                   |       |
        |       |           |       |                   |       |
        +-------+           +-------+                   +-------+
          swXpY

Patches 15-16 further generalize the struct by exploiting the fact that the
FID is a shared resource among ports. Each FID type is assigned a 'leave'
function that is invoked based on CHANGEUPPER events and takes care of the
necessary clean-up.

Patches 17-22 build upon the previous patches and use the FID struct for the
VLAN-aware bridge and take care of cleaning up FID resources in the 'leave'
functions. For now, these are only FDB records, but later on we'll have to
remove the RIFs associated with these FIDs, which will in turn take care of
routes and neighbours clean-up.

The last patch adds debug prints that proved very useful during the
development of this series.

Tested with the existing L2 recipes:
https://github.com/jpirko/lnst/tree/master/recipes/switchdev
====================

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

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