f2fs: Only lfs mode is allowed with zoned block device feature

Now f2fs support four block allocation modes: lfs, adaptive,
fragment:segment, fragment:block. Only lfs mode is allowed with zoned block
device feature.

Fixes: 6691d940 ("f2fs: introduce fragment allocation mode mount option")
Signed-off-by: Chunhai Guo <guochunhai@vivo.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>