Revert "Merge pull request #9900 from iNavFlight/dzikuvx-drop-MSP_PIDNAMES"

This reverts commit e5ab1e16ba, reversing
changes made to 2bd253393a.

src/main/fc/fc_msp.c

@@ -140,6 +140,18 @@ static const char * const boardIdentifier = TARGET_BOARD_IDENTIFIER;
 // from mixer.c
 extern int16_t motor_disarmed[MAX_SUPPORTED_MOTORS];
 
+static const char pidnames[] =
+    "ROLL;"
+    "PITCH;"
+    "YAW;"
+    "ALT;"
+    "Pos;"
+    "PosR;"
+    "NavR;"
+    "LEVEL;"
+    "MAG;"
+    "VEL;";
+
 typedef enum {
     MSP_SDCARD_STATE_NOT_PRESENT = 0,
     MSP_SDCARD_STATE_FATAL       = 1,
@@ -696,6 +708,12 @@ static bool mspFcProcessOutCommand(uint16_t cmdMSP, sbuf_t *dst, mspPostProcessF
         #endif
         break;
 
+    case MSP_PIDNAMES:
+        for (const char *c = pidnames; *c; c++) {
+            sbufWriteU8(dst, *c);
+        }
+        break;
+
     case MSP_MODE_RANGES:
         for (int i = 0; i < MAX_MODE_ACTIVATION_CONDITION_COUNT; i++) {
             const modeActivationCondition_t *mac = modeActivationConditions(i);

src/main/msp/msp_protocol.h

@@ -240,6 +240,7 @@
 #define MSP_ACTIVEBOXES          113    //out message         Active box flags (full width, more than 32 bits)
 #define MSP_MISC                 114    //out message         powermeter trig
 #define MSP_BOXNAMES             116    //out message         the aux switch names
+#define MSP_PIDNAMES             117    //out message         the PID names
 #define MSP_WP                   118    //out message         get a WP, WP# is in the payload, returns (WP#, lat, lon, alt, flags) WP#0-home, WP#16-poshold
 #define MSP_BOXIDS               119    //out message         get the permanent IDs associated to BOXes
 #define MSP_NAV_STATUS           121    //out message         Returns navigation status