Merge branch 'Microchip-Technology-KSZ9131'

Merge branch 'Microchip-Technology-KSZ9131'

Yuiko Oshino says:

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Add support for Microchip Technology KSZ9131 10/100/1000 Ethernet PHY

This is the initial driver for Microchip KSZ9131 10/100/1000 Ethernet PHY

v3:
- KSZ9131 uses picosecond units for values of devicetree properties.
- rewrite micrel.c and micrel-ksz90x1.txt to use the picosecond values.
v2:
- Creating a series from two related patches.
====================

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