wwan: core: Add WWAN ADB and MIPC port type

Add new WWAN ports that connect to the device's ADB protocol interface
and MTK MIPC diagnostic interface.

Signed-off-by: Jinjian Song <jinjian.song@fibocom.com>
Reviewed-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>