[PATCH] idle.c fix unused var compile warning

[Clemens Koller <clemens.koller@anagramm.de>]

This fixes a little warning about unused cpu variable for non SMP PPC systems.

Signed-off-by: Clemens Koller <clemens.koller@anagramm.de>
--

--- linux-2.6/arch/ppc/kernel/idle.c.ori	2005-12-14 12:27:26.000000000 +0100
+++ linux-2.6/arch/ppc/kernel/idle.c	2005-12-16 16:02:18.000000000 +0100
@@ -37,7 +37,9 @@
 void default_idle(void)
 {
 	void (*powersave)(void);
+#ifdef CONFIG_SMP
 	int cpu = smp_processor_id();
+#endif
 
 	powersave = ppc_md.power_save;