mm/page_alloc.c: add missing newline

Add missing line breaks on pr_warn().
Signed-off-by: Chen Tao <chentao107@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20200603063547.235825-1-chentao107@huawei.comSigned-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/page_alloc.c

@@ -7182,7 +7182,7 @@ static void __init find_zone_movable_pfns_for_nodes(void)
 		}
 
 		if (mem_below_4gb_not_mirrored)
-			pr_warn("This configuration results in unmirrored kernel memory.");
+			pr_warn("This configuration results in unmirrored kernel memory.\n");
 
 		goto out2;
 	}