Btrfs: Make raid_map array be inlined in btrfs_bio structure

It can make code more simple and clear, we need not care about
free bbio and raid_map together.

Signed-off-by: Miao Xie <[email protected]>
Signed-off-by: Zhao Lei <[email protected]>
Signed-off-by: Chris Mason <[email protected]>
5 files changed