HWPOISON: Turn ref argument into flags argument

Now that "ref" is just a boolean turn it into
a flags argument. First step is only a single flag
that makes the code's intention more clear, but more
may follow.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
diff --git a/mm/madvise.c b/mm/madvise.c
index 18970ae..6ca34f0 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -237,7 +237,7 @@
 		printk(KERN_INFO "Injecting memory failure for page %lx at %lx\n",
 		       page_to_pfn(p), start);
 		/* Ignore return value for now */
-		__memory_failure(page_to_pfn(p), 0, 1);
+		__memory_failure(page_to_pfn(p), 0, MF_COUNT_INCREASED);
 	}
 	return ret;
 }