bootloaders/syslinux: Also support LUKS UUID
bootloaders/syslinux: Also support LUKS UUID

Just like the systemd implementation, we now add support for dracut style
LUKS UUID activation by kernel parameters.

Signed-off-by: Ikey Doherty <15e2f59c60e9d84348e78a87e24660774f739add@intel.com>

ikeydoherty/clr-boot-manager,ikeydoherty/clr-boot-manager,ikeydoherty/clr-boot-manager,ikeydoherty/clr-boot-manager