[POWERPC] spufs: fix building spufs/spu_save_dump.h

Currently it fails with gcc from sdk 2.1 because of a spec change [1].
Maybe we should start using the definitions from spu_mfcio.h.

[1] http://gcc.gnu.org/ml/gcc-patches/2006-11/msg01598.html



Signed-off-by: Sebastian Siewior <bigeasy@linux.vnet.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>