Reformat blacklist flags to make the values easier to read and to
enhance error checking.
Signed-off-by: NHannes Reinecke <hare@suse.com>
Reviewed-by: NBart van Assche <bart.vanassche@wdc.com>
Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>