Added SDL_GetGamepadPowerLevel() to get the power level directly from a gamepad

src/dynapi/SDL_dynapi.sym

@@ -870,6 +870,7 @@ SDL3_0.0.0 {
     SDL_wcstol;
     SDL_ClearClipboardData;
     SDL_GetGamepadInstanceID;
+    SDL_GetGamepadPowerLevel;
     # extra symbols go here (don't modify this line)
   local: *;
 };

src/dynapi/SDL_dynapi_overrides.h

@@ -896,3 +896,4 @@
 /* New API symbols are added at the end */
 #define SDL_ClearClipboardData SDL_ClearClipboardData_REAL
 #define SDL_GetGamepadInstanceID SDL_GetGamepadInstanceID_REAL
+#define SDL_GetGamepadPowerLevel SDL_GetGamepadPowerLevel_REAL

src/dynapi/SDL_dynapi_procs.h

@@ -941,3 +941,4 @@ SDL_DYNAPI_PROC(long,SDL_wcstol,(const wchar_t *a, wchar_t **b, int c),(a,b,c),r
 /* New API symbols are added at the end */
 SDL_DYNAPI_PROC(int,SDL_ClearClipboardData,(void),(),return)
 SDL_DYNAPI_PROC(SDL_JoystickID,SDL_GetGamepadInstanceID,(SDL_Gamepad *a),(a),return)
+SDL_DYNAPI_PROC(SDL_JoystickPowerLevel,SDL_GetGamepadPowerLevel,(SDL_Gamepad *a),(a),return)

src/joystick/SDL_gamepad.c

@@ -2778,6 +2778,16 @@ const char * SDL_GetGamepadSerial(SDL_Gamepad *gamepad)
     return SDL_GetJoystickSerial(joystick);
 }
 
+SDL_JoystickPowerLevel SDL_GetGamepadPowerLevel(SDL_Gamepad *gamepad)
+{
+    SDL_Joystick *joystick = SDL_GetGamepadJoystick(gamepad);
+
+    if (joystick == NULL) {
+        return SDL_JOYSTICK_POWER_UNKNOWN;
+    }
+    return SDL_GetJoystickPowerLevel(joystick);
+}
+
 /*
  * Return if the gamepad in question is currently attached to the system,
  *  \return 0 if not plugged in, 1 if still present.