powerpc ppc32 fix definition of distribute_irqs

Now that I can attempt to compile powerpc/ppc32 it appears there is a problem with the definition of distribute_irqs, this patch seems to fix it for me.

-apw

=== 8< ===
powerpc: ppc32 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)

Against 2.6.15-rc3.

---

diff -upN reference/arch/powerpc/sysdev/mpic.c current/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
 
 /*