base-cbm,cbm-list,iface-cbm: remove usage of MMBaseModem

CBM isn't as complicated as SMS, and the CBM class itself doesn't
need to be overridden by QMI/MBIM/etc. Now that the log parent
and connection binding no longer require MMBaseModem we can flatten
the CBM object creation and remove usage of MMBaseModem.

Signed-off-by: Dan Williams <dan@ioncontrol.co>

src/mm-cbm-list.h

@@ -69,6 +69,7 @@ gboolean mm_cbm_list_has_part (MMCbmList *self,
                                guint8     part_num);
 
 gboolean mm_cbm_list_take_part (MMCbmList *self,
+                                GObject *bind_to,
                                 MMCbmPart *part,
                                 MMCbmState state,
                                 GError **error);