manual_test.c: New manual board testing mode

Change-Id: I8fc94fa08521224eff79d0aa9d7b42ceeaa760c9
diff --git a/sysmoOCTSIM/main.c b/sysmoOCTSIM/main.c
index 93b90db..6c4e9e6 100644
--- a/sysmoOCTSIM/main.c
+++ b/sysmoOCTSIM/main.c
@@ -211,7 +211,7 @@
 
 
 
-
+extern void testmode_init(void);
 
 int main(void)
 {
@@ -230,6 +230,7 @@
 	command_register(&cmd_sim_clkdiv);
 	command_register(&cmd_sim_voltage);
 	command_register(&cmd_sim_led);
+	testmode_init();
 
 	printf("\r\n\r\nsysmocom sysmoOCTSIM\r\n");