Currently the driver uses the ECC strength specified in DT.
The QPIC/EBI2 NAND supports 4 or 8-bit ECC correction. The same
kind of board can have different NAND parts so use the ECC
strength from device parameters if it is not specified in DT.
Signed-off-by: NAbhishek Sahu <absahu@codeaurora.org>
Signed-off-by: NMiquel Raynal <miquel.raynal@bootlin.com>