mtd: spi-nor: Add support for mt35xu02g

mt35xu02g is an Octal flash supporting Single and OCTAL I/O.
Tested on LS1028ARDB.

Signed-off-by: Kuldeep Singh <kuldeep.singh@nxp.com>
Signed-off-by: Ashish Kumar <ashish.kumar@nxp.com>
Reviewed-by: Vignesh Raghavendra <vigneshr@ti.com>
[tudor.ambarus@microchip.com: reword commit message]
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>