The iso image need cdrom and iso9660 drivers to boot, otherwise it will
hang when mounting the root file system
Signed-off-by: 李国 <uxgood.org@gmail.com>
The configuration was refreshed and KERNEL_TESTING_PATCHVER was set to
make it easy to compile for kernel 5.4.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>