feat: add support for RadioMaster TX16S MK3 (#7017)

Co-authored-by: philmoz <phil.a.mitchell@gmail.com>
Co-authored-by: 3djc <3djc@gh.com>
Co-authored-by: Peter Feerick <5500713+pfeerick@users.noreply.github.com>

radio/src/gui/common/stdlcd/draw_functions.cpp

@@ -450,6 +450,11 @@ void drawSourceCustomValue(coord_t x, coord_t y, mixsrc_t source, int32_t value,
   else if (source == MIXSRC_TX_VOLTAGE) {
     lcdDrawNumber(x, y, value, flags|PREC1);
   }
+#if defined(LUMINOSITY_SENSOR)
+  else if (source == MIXSRC_LIGHT) {
+    lcdDrawNumber(x, y, value, flags);
+  }
+#endif
 #if defined(INTERNAL_GPS)
     else if (source == MIXSRC_TX_GPS) {
     if (gpsData.fix) {