UPSTREAM: f2fs: handle error cases of memory donation

In cases of removing memory donation, we need to handle some error cases
like ENOENT and EACCES (indicating the range already has been donated).

Change-Id: Ib969b4226b43004db7b9de7f16492177210fb689
Signed-off-by: Daeho Jeong <daehojeong@google.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
(cherry picked from commit cf7cd17c)