Merge branch 'net-ks8851-Unify-KS8851-SPI-and-MLL-drivers'

Marek Vasut says:

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net: ks8851: Unify KS8851 SPI and MLL drivers

The KS8851SNL/SNLI and KS8851-16MLL/MLLI/MLLU are very much the same pieces
of silicon, except the former has an SPI interface, while the later has a
parallel bus interface. Thus far, Linux has two separate drivers for each
and they are diverging considerably.

This series unifies them into a single driver with small SPI and parallel
bus specific parts. The approach here is to first separate out the SPI
specific parts into a separate file, then add parallel bus accessors in
another separate file and then finally remove the old parallel bus driver.
The reason for replacing the old parallel bus driver is because the SPI
bus driver is much higher quality.

Note that I dropped "net: ks8851: Drop define debug and pr_fmt()" for now,
will send it separatelly later.
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Signed-off-by: David S. Miller <davem@davemloft.net>