x86 PAT: tone down debugging messages

Linus reported these excessive debug printouts:

>       Overlap at 0xe0300000-0xe0400000
>       Overlap at 0xe0300000-0xe0380000
>       Overlap at 0xe0300000-0xe0400000
>       Overlap at 0xe0300000-0xe0400000
>       Overlap at 0xe0300000-0xe0400000
>       Overlap at 0xe0300000-0xe0400000
>       Overlap at 0xe0300000-0xe0400000

turn that into a pr_debug().

Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index ef8b64b..9851265 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -334,7 +334,7 @@
 				break;
 			}
 
-			printk("Overlap at 0x%Lx-0x%Lx\n",
+			pr_debug("Overlap at 0x%Lx-0x%Lx\n",
 			       saved_ptr->start, saved_ptr->end);
 			/* No conflict. Go ahead and add this new entry */
 			list_add(&new_entry->nd, saved_ptr->nd.prev);