Additional fixes for processors without ISA_DSP_LEVEL2.  sigcontext_t does not
have dummy_acc1h, dummy_acc1l members any longer.
Signed-off-by: NHirokazu Takata <takata@linux-m32r.org>
Cc: <stable@kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>