parameter. Set its pointer target to 0.
* disk/mdraid_linux.c (grub_mdraid_detect): Add start_sector
parameter. Set its pointer target to 0 for 0.9 metadata, or to the
`data_offset' value from the superblock for 1.x metadata.
* disk/raid.c (grub_raid_read): Offset reads by the start sector of
data on the device.
(insert_array): Record the start sector of data on the device.
(grub_raid_register): Pass start_sector parameters to
grub_raid_list->detect and insert_array.
* include/grub/raid.h (struct grub_raid_array): Add start_sector
member.
(struct grub_raid): Add start_sector parameter to `detect'.