* grub-core/disk/raid.c (ascii2hex): New function.
(grub_raid_open): Accept mduuid/%s specification.
* grub-core/kern/emu/getroot.c (get_mdadm_name): Revamped into ...
(get_mdadm_uuid): ... this.
(grub_util_get_grub_dev): Use mduuid/%s if UUID is available.