Clarified where the paddle locations are

(cherry picked from commit ea714956b6e6851a279d1334309dd17b6d73cadc)

include/SDL_gamecontroller.h

@@ -724,10 +724,10 @@ typedef enum
     SDL_CONTROLLER_BUTTON_DPAD_LEFT,
     SDL_CONTROLLER_BUTTON_DPAD_RIGHT,
     SDL_CONTROLLER_BUTTON_MISC1,    /* Xbox Series X share button, PS5 microphone button, Nintendo Switch Pro capture button, Amazon Luna microphone button */
-    SDL_CONTROLLER_BUTTON_PADDLE1,  /* Xbox Elite paddle P1 */
-    SDL_CONTROLLER_BUTTON_PADDLE2,  /* Xbox Elite paddle P3 */
-    SDL_CONTROLLER_BUTTON_PADDLE3,  /* Xbox Elite paddle P2 */
-    SDL_CONTROLLER_BUTTON_PADDLE4,  /* Xbox Elite paddle P4 */
+    SDL_CONTROLLER_BUTTON_PADDLE1,  /* Xbox Elite paddle P1 (upper left, facing the back) */
+    SDL_CONTROLLER_BUTTON_PADDLE2,  /* Xbox Elite paddle P3 (upper right, facing the back) */
+    SDL_CONTROLLER_BUTTON_PADDLE3,  /* Xbox Elite paddle P2 (lower left, facing the back) */
+    SDL_CONTROLLER_BUTTON_PADDLE4,  /* Xbox Elite paddle P4 (lower right, facing the back) */
     SDL_CONTROLLER_BUTTON_TOUCHPAD, /* PS4/PS5 touchpad button */
     SDL_CONTROLLER_BUTTON_MAX
 } SDL_GameControllerButton;