m25p80: Add the is25wp256 SFPD table

m25p80: Add the is25wp256 SFPD table

Generated from hardware using the following command and then padding
with 0xff to fill out a power-of-2:
	xxd -p /sys/bus/spi/devices/spi0.0/spi-nor/sfdp

Cc: Michael Walle <michael@walle.cc>
Cc: Tudor Ambarus <tudor.ambarus@linaro.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Message-Id: <20221221122213.1458540-1-linux@roeck-us.net>
Signed-off-by: Cédric Le Goater <clg@kaod.org>