This update for systemd fixes the following issues:

- Drop support for efivar SystemdOptions (bsc#1220338)
- pid1: make clear that $WATCHDOG_USEC is set for the shutdown binary (bsc#1232227)
- udev: allow/denylist for reading sysfs attributes when composing a NIC name (bsc#1234015)
- udev: add new builtin net_driver
- udev-builtin-net_id: split-out pci_get_onboard_index() from dev_pci_onboard()
- udev-builtin-net_id: split-out get_pci_slot_specifiers()
- udev-builtin-net_id: introduce get_port_specifier() helper function
- udev-builtin-net_id: split out get_dev_port() and make its failure critical
- udev-builtin-net_id: split-out pci_get_hotplug_slot() and pci_get_hotplug_slot_from_address()
- udev-builtin-net_id: return earlier when hotplug slot is not found
- udev-builtin-net_id: skip non-directory entry earlier
- udev-builtin-net_id: make names_xen() self-contained
- udev-builtin-net_id: use sd_device_get_sysnum() to get index of netdevsim
- udev-builtin-net_id: make names_netdevsim() self-contained
- udev-builtin-net_id: make names_platform() self-contained
- udev-builtin-net_id: make names_vio() self-contained
- udev-builtin-net_id: make names_ccw() self-contained
- udev-builtin-net_id: make dev_devicetree_onboard() self-contained
- udev-builtin-net_id: make names_mac() self-contained
- udev-builtin-net_id: split out get_ifname_prefix()
- udev-builtin-net_id: swap arguments for streq() and friends
- udev-builtin-net_id: drop unused value from NetNameType