add PARTUUID as root=PARTUUID=<partition uuid> parameter

dracut.cmdline.7.asc

@@ -47,6 +47,7 @@ root=/dev/disk/by-label/Root
 root=LABEL=Root
 root=/dev/disk/by-uuid/3f5ad593-4546-4a94-a374-bcfb68aa11f7
 root=UUID=3f5ad593-4546-4a94-a374-bcfb68aa11f7
+root=PARTUUID=3f5ad593-4546-4a94-a374-bcfb68aa11f7
 ----
 
 **rootfstype=**_<filesystem type>_:: "auto" if not specified, e.g.:

modules.d/95rootfs-block/parse-block.sh

@@ -12,6 +12,10 @@ case "$root" in
         root="${root#block:}"
         root="block:/dev/disk/by-uuid/${root#UUID=}"
         rootok=1 ;;
+    block:PARTUUID=*|PARTUUID=*)
+        root="${root#block:}"
+        root="block:/dev/disk/by-partuuid/${root#PARTUUID=}"
+        rootok=1 ;;
     /dev/*)
         root="block:${root}"
         rootok=1 ;;