FROMGIT: f2fs: sysfs: export linear_lookup in features directory

cat /sys/fs/f2fs/features/linear_lookup
supported

Bug: 410768629
Bug: 423056658
(cherry picked from commit 617e0491
https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git dev)
Link: https://lore.kernel.org/linux-f2fs-devel/20250416054805.1416834-2-chao@kernel.org


Change-Id: I9762dc9d918f96e716a2e0b76a9fe6d168a6b56a
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
[Chao: Resolved conflicts in fs/f2fs/sysfs.c ]
(cherry picked from commit 4cf22d97)