mtd: spi-nor: intel-spi: Add support for Intel Alder Lake-S SPI serial flash

Intel Alder Lake-S has the same SPI serial flash controller as Cannon
Lake. Add Alder Lake-S PCI ID to the driver list of supported devices.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Link: https://lore.kernel.org/r/20200925095109.51148-1-mika.westerberg@linux.intel.com