[U-Boot] nand_util: correct YAFFS image write function

[Scott Wood]

On Tue, Jan 17, 2012 at 07:55:02PM -0000, Liu wrote:
> In function nand_write_skip_bad(),for YAFFS filesystem part,
> write_oob() will return 0 when success, so when rval equals 0,
> it should continue to write the next page, and no break.
> 
> Signed-off-by: Wentao, Liu <wentao.liu at intel.com>
> Acked-by: Lei Wen <leiwen at marvell.com>

Applied to u-boot-nand-flash (sorry about the delay)

-Scott