(OFDISK_HASH_SZ): Define. (ofdisk_hash): New hash table. (ofdisk_hash_fn, ofdisk_hash_find, ofdisk_hash_add): New functions. (grub_ofdisk_open): Use ofdisk_hash_ent address as disk->id instead of device phandle which is not unique.
(OFDISK_HASH_SZ): Define. (ofdisk_hash): New hash table. (ofdisk_hash_fn, ofdisk_hash_find, ofdisk_hash_add): New functions. (grub_ofdisk_open): Use ofdisk_hash_ent address as disk->id instead of device phandle which is not unique.