f2fs: no more dirty_nat_entires when flushing
f2fs: no more dirty_nat_entires when flushing

After flushing dirty nat entries, it has to be no more dirty nat
entries.

Signed-off-by: Changman Lee <f10da886ecf5f6d400f766170992d382feccd416@samsung.com>
Signed-off-by: Jaegeuk Kim <71255387a32c360dfbe6dfb7aaeb123bf1dc8cb6@kernel.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs