x86: convert Dprintk to pr_debug

There are a couple of places where (P)Dprintk is used which is an old
compile time enabled printk wrapper. Convert it to the generic
pr_debug().

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/x86/kernel/cpu/perfctr-watchdog.c b/arch/x86/kernel/cpu/perfctr-watchdog.c
index 6d4bdc0..de7439f 100644
--- a/arch/x86/kernel/cpu/perfctr-watchdog.c
+++ b/arch/x86/kernel/cpu/perfctr-watchdog.c
@@ -250,7 +250,7 @@
 
 	do_div(count, nmi_hz);
 	if(descr)
-		Dprintk("setting %s to -0x%08Lx\n", descr, count);
+		pr_debug("setting %s to -0x%08Lx\n", descr, count);
 	wrmsrl(perfctr_msr, 0 - count);
 }
 
@@ -261,7 +261,7 @@
 
 	do_div(count, nmi_hz);
 	if(descr)
-		Dprintk("setting %s to -0x%08Lx\n", descr, count);
+		pr_debug("setting %s to -0x%08Lx\n", descr, count);
 	wrmsr(perfctr_msr, (u32)(-count), 0);
 }