Fix MT5700 connection creation after a cold boot (#68).
- Create the MT5700 USB autodial connection even before its network device appears, instead of falling back to MBIM without a control port.
- Install the standard Huawei CDC NCM kernel package as a dependency for the vendor NCM layout. Preserve existing working CDC NCM bindings.
- Correct diagnostics: PIN2 is no longer blamed for a NO_REGISTRATION failure (#69).
Validation: 87 regression tests pass, including MT5700 startup and interface creation. Hardware confirmation of the vendor NCM path is still pending. Kernel packages must match the installed OpenWrt kernel.