x86: revert printk format warning change which is for linux-next

commit 62179849b40aded9e727cca5006627a1c4d6446e
    x86: fix setup printk format warning

is for linux-next and not for .26

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index cc6f5eb..c0c68c1 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -95,7 +95,7 @@
 
 	/* Copy section for each CPU (we discard the original) */
 	size = PERCPU_ENOUGH_ROOM;
-	printk(KERN_INFO "PERCPU: Allocating %zd bytes of per cpu data\n",
+	printk(KERN_INFO "PERCPU: Allocating %lu bytes of per cpu data\n",
 			  size);
 
 	for_each_possible_cpu(i) {