Merge branch 'dsa-microchip-rmii-reference'

Ante Knezic says:

====================
net: dsa: microchip: enable setting rmii reference

KSZ88X3 devices can select between internal and external RMII reference clock.
This patch series introduces new device tree property for setting reference
clock to internal.

---
V5:
  - move rmii-clk-internal to be a port device tree property.
V4:
  - remove rmii_clk_internal from ksz_device, as its not needed any more
  - move rmii clk config as well as ksz8795_cpu_interface_select to
    ksz8_config_cpu_port
V3:
  - move ksz_cfg from global switch config to port config as suggested by Vladimir
    Oltean
  - reverse patch order as suggested by Vladimir Oltean
  - adapt dt schema as suggested by Conor Dooley
V2:
  - don't rely on default register settings - enforce set/clear property as
    suggested by Andrew Lunn
  - enforce dt schema as suggested by Conor Dooley
====================

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