Add "nopcie" security level

Some of the USB4 systems report "nopcie" security level when the PCIE tunnel is disabled in BIOS and bolt can't recognize "nopcie" security level and aborts the authentication. Therefore, the user can't get the device information through boltctl. This work enabled bolt to continue to authenticate the Thunderbolt device without falling into BOLT_SECURITY_UNKNOWN by adding a "nopcie" security level.

The detailed document can be found here

Resolves: #187 (closed)

Signed-off-by: Kate Hsuan hpa@redhat.com