Add cli_ prefix to readline functions

This makes it clear where the code resides.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/hymod/input.c b/board/hymod/input.c
index 23d3f19..59ad6aa 100644
--- a/board/hymod/input.c
+++ b/board/hymod/input.c
@@ -19,7 +19,7 @@
 		reset_cmd_timeout ();
 #endif
 
-		n = readline (prompt);
+		n = cli_readline(prompt);
 
 		if (n < 0)
 			return (n);
@@ -47,7 +47,7 @@
 		reset_cmd_timeout ();
 #endif
 
-		n = readline ("Enter board ethernet address: ");
+		n = cli_readline("Enter board ethernet address: ");
 
 		if (n < 0)
 			return (n);