spi: spi-mem: Introduce a default ->exec_op() debug log

spi: spi-mem: Introduce a default ->exec_op() debug log

Many spi-mem controller drivers have a very similar debug log at the
beginning of their ->exec_op() callback implementation. This debug log is
effectively useful, so let's create one that is complete and concise
enough, so developers no longer need to write their own. The verbosity
being high, VERBOSE_DEBUG will be required in this case.

Remove the debug log from individual drivers and propose a common one.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Link: https://patch.msgid.link/20250320115644.2231240-1-miquel.raynal@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>