x86: more apic debugging

[ mingo@elte.hu: picked up this patch from Maciej, lets make apic=debug
                 print out more info - we had a lot of APIC changes ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>

include/asm-x86/apic.h

@@ -12,7 +12,7 @@
 
 #define ARCH_APICTIMER_STOPS_ON_C3	1
 
-#define Dprintk(x...)
+#define Dprintk printk
 
 /*
  * Debugging macros