add ability to supply kernel driver name from udev

src/kerneldevice/mm-kernel-device-udev.c

@@ -338,10 +338,21 @@ kernel_device_get_name (MMKernelDevice *_self)
     return mm_kernel_event_properties_get_name (self->priv->properties);
 }
 
+/* Driver name for devices without one in sysfs, e.g. the virtual rmnet_ipa0 of
+ * Qualcomm vendor kernels, which is handled like the mainline 'ipa' driver */
+#define ID_MM_KERNEL_DRIVER "ID_MM_KERNEL_DRIVER"
+
 static const gchar *
-kernel_device_get_driver (MMKernelDevice *self)
+kernel_device_get_driver (MMKernelDevice *_self)
 {
-    return MM_KERNEL_DEVICE_UDEV (self)->priv->driver;
+    MMKernelDeviceUdev *self;
+    const gchar        *driver;
+
+    self = MM_KERNEL_DEVICE_UDEV (_self);
+    if (self->priv->device &&
+        (driver = g_udev_device_get_property (self->priv->device, ID_MM_KERNEL_DRIVER)) != NULL)
+        return driver;
+    return self->priv->driver;
 }
 
 static const gchar *