f2fs: drop inode from the donation list when the last file is closed

f2fs: drop inode from the donation list when the last file is closed

[ Upstream commit 078cad8212ce4f4ebbafcc0936475b8215e1ca2a ]

Let's drop the inode from the donation list when there is no other
open file.

Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Stable-dep-of: 10b591e7fb7c ("f2fs: fix to avoid updating compression context during writeback")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>