Revert "util-linux: bump to version 2.30"

Revert "util-linux: bump to version 2.30"

This reverts commit 088292cfc16359b966882f66b6e94dbc2c9813cb to prevent
breaking the build while we search for the root cause of the problem.

Fixes:
  http://autobuild.buildroot.net/results/7b0b1d8ba0015308724a9677f890e6e63f77e0ad
  http://autobuild.buildroot.net/results/11476388b8b774dc5ca7c9ceb34ea9ad1a4314b9
  http://autobuild.buildroot.net/results/9730d0c4a4001314351a0a116164ba854272db4d
  http://autobuild.buildroot.net/results/4d1440360bddfd0ddbbdddf6077bca0e796f2949
  http://autobuild.buildroot.net/results/f3089d8b8727a526eeb553964711e0066287422e
  http://autobuild.buildroot.net/results/ace6aaad6bee0f4bed44126fea57a090ff2541f9
  http://autobuild.buildroot.net/results/ff460fff5da05d38776eb04e8ada947290248f42
  http://autobuild.buildroot.net/results/a4979169d78938e0cc06e6a69eaac0ab13dc3084
  http://autobuild.buildroot.net/results/84e8c23ecb77a99f9bb70fca9de4a5062414037d
  http://autobuild.buildroot.net/results/d3433ef125b5cfbf8a4b8824c256dbd0ea34b6bb
  http://autobuild.buildroot.net/results/92bc3ae63709dae8cdb8860bd997f72c92ede442
  http://autobuild.buildroot.net/results/d9122512b0d0802c19184eccb5056bf985f74e5b
  http://autobuild.buildroot.net/results/dad980abe5dc72df436b21270797b32435b55392
  http://autobuild.buildroot.net/results/7def156b29011b90a20579b4bad436a7acde498c
  http://autobuild.buildroot.net/results/0bb97b8edc5cea657992cdb083ce9ae79c969f03
  http://autobuild.buildroot.net/results/8f76af2caf7dd08919a20cc1fd848c920512e988
  http://autobuild.buildroot.net/results/3a8ecda0ce63dd67a73d66fbd238072ddb079900
  http://autobuild.buildroot.net/results/8d43e6f00be41fde7163868c5fbc3235097629ed
  http://autobuild.buildroot.net/results/5049aab863707aae09bde540d98ea8063c017e7e
  http://autobuild.buildroot.net/results/e227393a29590b298112dfd8efa4aebe2ffa9294
  http://autobuild.buildroot.net/results/8ad4455dcdfcd991dff728910bdbcfa57f5774a4
  http://autobuild.buildroot.net/results/27947db73e4875df1dbeee35a6ea8ad6a31af0b5
  http://autobuild.buildroot.net/results/5a9cc647e648a61e3c24f929987df356abcdc104
  http://autobuild.buildroot.net/results/eb01bb21f6c942cf8cf067450f016fd3893cc7cd
  http://autobuild.buildroot.net/results/6f7e3f6b4acc93ce695c07199cf6bf643db4386e

Signed-off-by: Carlos Santos <casantos@datacom.ind.br>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>