mtd: msm_qpic_nand: Update ECC correctable bits

Update the ECC correctable bits as per updated nand_flash_dev structure,
to fix the compilation issue as well as to a newer solution for
specifying ECC info.

Change-Id: If91b2ee63c10e45efe64b8624ac3c80f57319742
Signed-off-by: Pavan Anamula <pavana@codeaurora.org>