spi: dw: Quite logging on deferred controller registration

It's pretty possible to have the spi_register_controller() method
returning -EPROBE_DEFER status in case, for instance, if the GPIOs used
for the CS implementation aren't ready to be requested due to the
corresponding platform devices still pending to be probed. Let's make sure
the DW SSI driver won't print error message in that case by calling the
dev_err_probe() function if the SPI-registration procedure exited with
a non-zero status.

Signed-off-by: Serge Semin <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

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