[POWERPC] spufs: Add bit definition

Add a bit define from book, and replace one hex number with a
symbol, for clarity.

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>
diff --git a/arch/powerpc/platforms/cell/spufs/run.c b/arch/powerpc/platforms/cell/spufs/run.c
index 6625ed2..3ba30ce 100644
--- a/arch/powerpc/platforms/cell/spufs/run.c
+++ b/arch/powerpc/platforms/cell/spufs/run.c
@@ -29,7 +29,8 @@
 	spu = ctx->spu;
 	pte_fault = spu->dsisr &
 	    (MFC_DSISR_PTE_NOT_FOUND | MFC_DSISR_ACCESS_DENIED);
-	return (!(*stat & 0x1) || pte_fault || spu->class_0_pending) ? 1 : 0;
+	return (!(*stat & SPU_STATUS_RUNNING) || pte_fault || spu->class_0_pending) ?
+		1 : 0;
 }
 
 static int spu_setup_isolated(struct spu_context *ctx)