xfs: Use defines for CRC offsets in all cases

Some calls to crc functions used useful #defines,
others used awkward offsetof() constructs.

Switch them all to #define to make things a bit cleaner.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

diff --cc fs/xfs/xfs_ag.h
Simple merge

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

diff --cc fs/xfs/xfs_dinode.h
Simple merge

diff --cc fs/xfs/xfs_format.h
Simple merge

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

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

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

diff --cc fs/xfs/xfs_sb.h
Simple merge

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