zte: handle Icera-based devics that use DHCP

This is the port to git master of the following commit:

commit d2654a287c309346cc46b535dd974b0a5fc06fd4
Author: Dan Williams <dcbw@redhat.com>
Date:   Tue Aug 28 12:15:30 2012 -0500

    zte: handle Icera-based devics that use DHCP

    Since we can't autodetect that the devices use DHCP, we'll need to
    tag them with udev rules for the time being.

plugins/zte/77-mm-zte-port-types.rules

@@ -183,5 +183,8 @@ ATTRS{idProduct}=="2002", ENV{.MM_USBIFNUM}=="01", ENV{ID_MM_ZTE_PORT_TYPE_AUX}=
 ATTRS{idProduct}=="2003", ENV{.MM_USBIFNUM}=="03", ENV{ID_MM_ZTE_PORT_TYPE_MODEM}="1"
 ATTRS{idProduct}=="2003", ENV{.MM_USBIFNUM}=="01", ENV{ID_MM_ZTE_PORT_TYPE_AUX}="1"
 
+# Icera-based devices that use DHCP, not AT%IPDPADDR
+ATTRS{product}=="K3805-z", ENV{ID_MM_ZTE_ICERA_DHCP}="1"
+
 LABEL="mm_zte_port_types_end"
 

plugins/zte/mm-plugin-zte.c

@@ -92,6 +92,13 @@ grab_port (MMPlugin *self,
             pflags = MM_AT_PORT_FLAG_SECONDARY;
     }
 
+    if (g_udev_device_get_property_as_boolean (port, "ID_MM_ZTE_ICERA_DHCP")) {
+        mm_dbg ("Icera-based ZTE modem will use DHCP");
+        g_object_set (modem,
+                      MM_BROADBAND_MODEM_ICERA_DEFAULT_IP_METHOD, MM_BEARER_IP_METHOD_DHCP,
+                      NULL);
+    }
+
     return mm_base_modem_grab_port (modem,
                                     mm_port_probe_get_port_subsys (probe),
                                     mm_port_probe_get_port_name (probe),