f2fs: prevent writing without fallocate() for pinned files

[ Upstream commit 3fdd89b4 ]

In a case writing without fallocate(), we can't guarantee it's allocated
in the conventional area for zoned stroage. To make it consistent across
storage devices, we disallow it regardless of storage device types.

Signed-off-by: Daeho Jeong <daehojeong@google.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Stable-dep-of: ba8dac35 ("f2fs: fix to zero post-eof page")
Signed-off-by: Sasha Levin <sashal@kernel.org>