linux-imx

f2fs: shrink size of struct discard_cmd

In order to shrink size of struct discard_cmd, change variable type of
@state in struct discard_cmd from int to unsigned char.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>