We don't use $msg and $status.
Also, by always initializing l1d_mode, we fix the following "crash",
when running with `--sysfs-only`:
`
CVE-2018-3646 aka 'Foreshadow-NG (VMM), L1 terminal fault'
* Information from the /sys interface: VMX: vulnerable
./spectre-meltdown-checker.sh: line 3945: [: : integer expression expected
`
