live image type was replaced by hddimg recently. This made
NOHDD and NOISO options ineffective as they only influence
live builds. It also causes image building failure for
image sizes >4Gb
Returned back live image type and disabled building iso image.
This doesn't change result (hddimg is built), but it makes
NOHDD and NOISO working as expected.
[YOCTO #11842]
Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>