Merge branch 'net-dsa-microchip-Convert-to-regmap'

Marek Vasut says:

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net: dsa: microchip: Convert to regmap

This patchset converts KSZ9477 switch driver to regmap.

This was tested with extra patches on KSZ8795. This was also tested
on KSZ9477 on Microchip KSZ9477EVB board, which I now have.
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Signed-off-by: Marek Vasut <marex@denx.de>