[PATCH] powerpc32: fix definition of distribute_irqs

When we select ppc32 under the powerpc architecture we get the
error below.  This relates to defining distribute_irqs when this
configuratiom option is undefined.

      CC      arch/powerpc/sysdev/mpic.o
    .../arch/powerpc/sysdev/mpic.c: In function `mpic_setup_this_cpu':
    .../arch/powerpc/sysdev/mpic.c:788: error: `CONFIG_IRQ_ALL_CPUS'
	undeclared (first use in this function)
Signed-off-by: NAndy Whitcroft <apw@shadowen.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

arch/powerpc/sysdev/mpic.c

@@ -45,7 +45,11 @@ static struct mpic *mpic_primary;
 static DEFINE_SPINLOCK(mpic_lock);
 
 #ifdef CONFIG_PPC32	/* XXX for now */
-#define distribute_irqs	CONFIG_IRQ_ALL_CPUS
+#ifdef CONFIG_IRQ_ALL_CPUS
+#define distribute_irqs	(1)
+#else
+#define distribute_irqs	(0)
+#endif
 #endif
 
 /*