jbd2: don't start fast commit on aborted journal

Fast commit should not be started if the journal is aborted.

Signed-off-by: Harshad <Shirwadkar&lt;harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20201106035911.1942128-22-harshadshirwadkar@gmail.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>