setexpr: Silence some diagnostic messages

Neither successful match nor lack thereof should be considered an
extraordinary situation. Thus, neither require printing a message.

Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/cmd/setexpr.c b/cmd/setexpr.c
index 4d671e7..233471f 100644
--- a/cmd/setexpr.c
+++ b/cmd/setexpr.c
@@ -215,7 +215,7 @@
 
 		if (res == 0) {
 			if (loop == 0) {
-				printf("%s: No match\n", data);
+				debug("%s: No match\n", data);
 				return 1;
 			} else {
 				break;
@@ -359,7 +359,7 @@
 	if (ret)
 		return 1;
 
-	printf("%s=%s\n", name, data);
+	debug("%s=%s\n", name, data);
 
 	return env_set(name, data);
 }