AP_SerialMananger: adjust metadata for moved options bits

Author: peterbarker

libraries/AP_SerialManager/AP_SerialManager.cpp

@@ -272,8 +272,8 @@ const AP_Param::GroupInfo AP_SerialManager::var_info[] = {
 #if HAL_HAVE_SERIAL1_PARAMS
     // @Param: 1_OPTIONS
     // @DisplayName: Telem1 options
-    // @Description: Control over UART options. The InvertRX option controls invert of the receive pin. The InvertTX option controls invert of the transmit pin. The HalfDuplex option controls half-duplex (onewire) mode, where both transmit and receive is done on the transmit wire. The Swap option allows the RX and TX pins to be swapped on STM32F7 based boards.
-    // @Bitmask: 0:InvertRX, 1:InvertTX, 2:HalfDuplex, 3:SwapTXRX, 4: RX_PullDown, 5: RX_PullUp, 6: TX_PullDown, 7: TX_PullUp, 8: RX_NoDMA, 9: TX_NoDMA, 10: Don't forward mavlink to/from, 11: DisableFIFO, 12: Ignore Streamrate
+    // @Description: Control over UART options. The InvertRX option controls invert of the receive pin. The InvertTX option controls invert of the transmit pin. The HalfDuplex option controls half-duplex (onewire) mode, where both transmit and receive is done on the transmit wire. The Swap option allows the RX and TX pins to be swapped on STM32F7 based boards.  NOTE that two bits have moved from this parameter into MAVn_OPTIONS!
+    // @Bitmask: 0:InvertRX, 1:InvertTX, 2:HalfDuplex, 3:SwapTXRX, 4: RX_PullDown, 5: RX_PullUp, 6: TX_PullDown, 7: TX_PullUp, 8: RX_NoDMA, 9: TX_NoDMA, 10: UNUSED OPTION (was Don't forward mavlink to/from); see MAVn_OPTIONS, 11: DisableFIFO, 12: UNUSED OTION (was Ignore Streamrate); see MAVn_OPTIONS
     // @User: Advanced
     // @RebootRequired: True
     AP_GROUPINFO("1_OPTIONS",  14, AP_SerialManager, state[1].options, DEFAULT_SERIAL1_OPTIONS),