LU-16518 lst: fix switch-case unannotated fall-through (2)

LU-16518 lst: fix switch-case unannotated fall-through (2)

Fix more unannotated fall-through errors reported by Clang,
by moving the default case to the end of the switch-case
statement.

Test-Parameters: trivial
Signed-off-by: Timothy Day <timday@amazon.com>
Change-Id: I12fb3bf709f2edd6ef03f58c122255319dc91049
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/58345
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>