mtd: spi-nor: fsl-quadspi: add support for ls2080a/ls1080a

LS2080a/LS1088a supports Freescale Quad SPI controller.
Add fsl-quadspi driver support for ls2080a and ls1088a chip.

Signed-off-by: Suresh Gupta <suresh.gupta@nxp.com>
Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>