[PATCH] mtd: add a new macro about the subpage write

[Huang Shijie]

Hi Brian:
> Wood [1]; I don't see a good reason not to just kill the
> NAND_CHIPOPTIONS_MSK instead of adding more flags. As long as we
> perform a few sanity tests, I think it'd be safe.
>
I think it's more clear in logic to add this new macro:
    The NAND_NO_SUBPAGE_WRITE can be used only by the MLC nands which do 
no support the subpage write;
    The NAND_CONTROLLER_NO_SUBPAGE_WRITE only used by the nand 
controller such as gpmi nand.

But I will be happy if you submit a patch to fix this issue by removing 
the NAND_CHIPOPTIONS_MSK.

thanks
Huang Shijie