Fedora 30 and RHEL-8.2 onwards support the Bootloader Spec and use grubby to manage kernel menu entries and kernel arguments. https://fedoraproject.org/wiki/Changes/BootLoaderSpecByDefault This change detects if this is a BLS enabled environment, and uses grubby to set kernel arguments on all kernel entries if it is. Change-Id: I2701260d54cf6bc79f1ac765b512d99d799e8c43