fix ESP32 IMU task priority

Author: qqqlab

src/madflight/hw_ESP32/hw_ESP32.h

@@ -40,7 +40,7 @@ This file defines:
 //                    IMU
 //======================================================================================================================//
 #define IMU_EXEC IMU_EXEC_FREERTOS //ESP32 always uses FreeRTOS on core0 (can't used float on core1)
-#define IMU_FREERTOS_TASK_PRIORITY 31 //IMU Interrupt task priority, higher number is higher priority. Max priority on ESP32 is 31
+#define IMU_FREERTOS_TASK_PRIORITY (configMAX_PRIORITIES - 1) //IMU Interrupt task priority, higher number is higher priority. Max priority on ESP32 is 31
 
 //======================================================================================================================//
 //                    FREERTOS