mtd: spi-nor: drop superfluous debug prints

The mtd data shall be obtained with the mtd ioctls or with
new debugfs entries if one cares. Drop the debug prints.

Reviewed-by: Michael Walle <michael@walle.cc>
Link: https://lore.kernel.org/r/20231215082138.16063-5-tudor.ambarus@linaro.org


Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>