[POWERPC] Fix sysctl table check failure on PowerMac

kernel was marked with 0755. Everywhere else it's 0555.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/kernel/idle.c

@@ -122,7 +122,7 @@ static ctl_table powersave_nap_sysctl_root[] = {
 	{
 		.ctl_name	= CTL_KERN,
 		.procname	= "kernel",
-		.mode		= 0755,
+		.mode		= 0555,
 		.child		= powersave_nap_ctl_table,
 	},
 	{}