[NAND] Do we support COPY_BACK operation in nand flash?

[Du Zhongdong]

Hi, all.

I'm trying to writing a mtd-based driver for HY27UK08BGFM nand flash,
and in the data sheet, there's a COPY-BACK program which is
'configured to quickly and efficiently rewrite data stored in one page
without utilizing an external memory.'

Then I dig through the source: nand.h & nand_base.c, it seems there's
no command for such COPY-BACK operation.

I'm wondering, is there any alternative if I want to take advantage of
this COPY-BACK operation?

Best regards,
Du Zhongdong