Fix adding 'boot=' option in FIPS mode
'boot=' option shouldn't be added when there is no separate /boot
partition.
Resolves: rhbz#1190146
Signed-off-by: Vojtech Trefny <vtrefny@redhat.com>
(cherry picked from commit 2d36da0f2f5646985563e0a28bafc352148c0a10)