xfs: use xfs_da_geometry for block size in attr code

Rather than using the superblock value obtained through the
xfs_mount.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

diff --cc fs/xfs/xfs_attr.c
Simple merge

diff --cc fs/xfs/xfs_attr_leaf.c
Simple merge

diff --cc fs/xfs/xfs_log_rlimit.c
Simple merge