mtd: spi-nor: intel-spi: Add support for Intel Cedar Fork SPI serial flash

Intel Cedar Fork has the same SPI serial flash controller than Intel
Denverton. Add the Intel Cedar Fork PCI ID to the driver list of
supported devices.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>