99suse: Add SUSE-specific initrd parsing

Signed-off-by: Thomas Renninger <trenn@suse.de>
45ifcfg: Add SUSE-specific write-ifcfg file

Signed-off-by: Pawel Wieczorkiewicz <pwieczorkiewicz@suse.com>
45ifcfg: Fixup error message in write-ifcfg-suse

A fix was missing in write-ifcfg-suse.sh, cause dracut to issue
a warning for a non-existent file.

References: bnc#881286

Signed-off-by: Hannes Reinecke <hare@suse.de>