btrfs: use BTRFS_SUPER_INFO_SIZE macro at btrfs_read_dev_super()
btrfs: use BTRFS_SUPER_INFO_SIZE macro at btrfs_read_dev_super()

Signed-off-by: Anand Jain <81069a49b521acf79f562d472ec8c4e0d6a88433@oracle.com>
Signed-off-by: Josef Bacik <631dfb3d07694fdcf26abc7aac2c6c2b641f8bde@fusionio.com>
Signed-off-by: Chris Mason <a169954b4cb1a46cee25f659d3bddfebe02b5fba@fusionio.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs