* include/grub/i386/linuxbios/memory.h
(GRUB_MEMORY_MACHINE_LINUXBIOS_TABLE_ADDR): Remove macro.
* kern/i386/linuxbios/table.c (grub_linuxbios_table_iterate): Do not
receive `table_header' as argument. Instead, probe for it in the
known memory ranges where it can be present.
(grub_available_iterate): Do not pass a fixed `table_header' address
to grub_linuxbios_table_iterate().