Add support for VSC8531_02 PHY ID.
Also provide an option to tune RGMII delay value via devicetree.
The default delays are retained in the driver.

v2 changes:
- Added patch to use a common vendor phy id match
- Removed dt include header patch because delays should be specied in
ps, not register values
- Updated DT binding description and commit for optional delay tuning to
be clearer on the precedence
- Updated dt property name to include vendor instead of phy device name
- Switch both VSC8531 and VSC8531-02 to use exact phy id match as they
share the same model number
- Ensure RCT
- Improve optional property read

RFC link: https://lore.kernel.org/all/20210629094038.18610-1-harini.katakam@xilinx.com/

Harini Katakam (3):
  phy: mscc: Use PHY_ID_MATCH_VENDOR to minimize PHY ID table
  dt-bindings: mscc: Add RGMII RX and TX delay tuning
  phy: mscc: Add support for VSC8531_02 with RGMII tuning

 .../bindings/net/mscc-phy-vsc8531.txt         |  2 +
 drivers/net/phy/mscc/mscc.h                   |  3 ++
 drivers/net/phy/mscc/mscc_main.c              | 54 +++++++++++++------
 3 files changed, 42 insertions(+), 17 deletions(-)

-- 
2.17.1