LU-14899 ldiskfs: Add 5.4.136 mainline kernel support

LU-14899 ldiskfs: Add 5.4.136 mainline kernel support

The changes likely appeared in an earlier release
that we may also track down and update to.

Test-Parameters: trivial
Change-Id: I92125087650109b8cc8a968b2fd95ba5f8e7f998
Signed-off-by: Oleg Drokin <green@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/44450
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Yang Sheng <ys@whamcloud.com>
Reviewed-by: Shaun Tancheff <shaun.tancheff@hpe.com>