Fix compilation with MULTIMODULE=NO

And allow for Spektrum telemetry to stay enabled (needed for DSMP module).

radio/src/telemetry/multi.cpp

@@ -19,11 +19,17 @@
  * GNU General Public License for more details.
  */
 #include "opentx.h"
-#include "telemetry.h"
-#include "multi.h"
-#include "io/multi_protolist.h"
 #include "aux_serial_driver.h"
 
+#include "telemetry.h"
+#include "io/multi_protolist.h"
+#include "multi.h"
+#include "spektrum.h"
+#include "flysky_ibus.h"
+#include "hitec.h"
+#include "hott.h"
+#include "mlink.h"
+
 constexpr int32_t MULTI_DESIRED_VERSION = (1 << 24) | (3 << 16) | (3 << 8)  | 0;
 #define MULTI_CHAN_BITS 11