The Marvell PXA SSP block is the same or similiar to the MMP2 variant.
The only difference in the binding is the PXA version supports DMA (and
that's probably a binding difference rather than an actual h/w
difference).

The old binding didn't belong under 'serial' as it is not a UART. The
SSP block also supports audio devices, so 'spi' is not a perfect fit
either. As the existing schema for MMP2 is there, just leave things
as-is.

The examples in the old text binding were pretty out of sync with
reality. 'clock-names' and 'ssp-id' aren't documented nor used.

Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://msgid.link/r/20240522132859.3146335-1-robh@kernel.orgSigned-off-by: Mark Brown <broonie@kernel.org>