Use kernel RAID6 galois tables for later RAID6 recovery.
Galois tables file, kernel-lib/tables.c is generated by user space
program, mktable.
Galois field tables declaration, in kernel-lib/raid56.h, is completely
copied from kernel.
The mktables.c is copied from kernel with minor header/macro
modification, to ensure the generated tables.c works well in
btrfs-progs.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Qu Wenruo