udev: path_id - export path for platform block devices

Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
>
> E.g. I have a platform with two sdhci controllers with different purposes.
> First slot is an external slot while second one is internal with a
> non-removable card.
>
> When there is a card in the external slot at boot, the non-removable card is
> named 'mmcblk1'; without the external card it is 'mmcblk0'.  Vice versa for the
> external card.

https://bugs.freedesktop.org/show_bug.cgi?id=52309

src/udev/udev-builtin-path_id.c

@@ -458,6 +458,7 @@ static int builtin_path_id(struct udev_device *dev, int argc, char *argv[], bool
                 } else if (strcmp(subsys, "platform") == 0) {
                         path_prepend(&path, "platform-%s", udev_device_get_sysname(parent));
                         parent = skip_subsystem(parent, "platform");
+                        some_transport = true;
                 } else if (strcmp(subsys, "acpi") == 0) {
                         path_prepend(&path, "acpi-%s", udev_device_get_sysname(parent));
                         parent = skip_subsystem(parent, "acpi");