jbd2: fix kernel-doc markups

[ Upstream commit 2bf31d94423c8ae3ff58e38a115b177df6940399 ]

Kernel-doc markup should use this format:
        identifier - description

They should not have any type before that, as otherwise
the parser won't do the right thing.

Also, some identifiers have different names between their
prototypes and the kernel-doc markup.

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/72f5c6628f5f278d67625f60893ffbc2ca28d46e.1605521731.git.mchehab+huawei@kernel.org


Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Stable-dep-of: e34c8dd238d0 ("jbd2: Fix wrongly judgement for buffer head removing while doing checkpoint")
Signed-off-by: Sasha Levin <sashal@kernel.org>