3 - nand-ecc-mode : String, operation mode of the NAND ecc mode.
4 Supported values are: "none", "soft", "hw", "hw_syndrome", "hw_oob_first",
6 - nand-bus-width : 8 or 16 bus width if not present 8
7 - nand-on-flash-bbt: boolean to enable on flash bbt option if not present false