FreeRTOS-Plus-TCP upgrade from 3.1.0 to 4.2.2

Libraries
2

@rdarbha

Can you try updating the above mentioned lines in source\include\FreeRTOSIPConfigDefaults.h to something like this:

#if (configENABLE_MPU != 0)
    #if ( ipconfigIP_TASK_PRIORITY > ( ( configMAX_PRIORITIES - 1 ) | portPRIVILEGE_BIT ) )
        #error ipconfigIP_TASK_PRIORITY must be at most ( ( configMAX_PRIORITIES - 1 ) | portPRIVILEGE_BIT ) )
    #endif
#else
    #if ( ipconfigIP_TASK_PRIORITY > ( configMAX_PRIORITIES - 1 ) )
        #error ipconfigIP_TASK_PRIORITY must be at most configMAX_PRIORITIES - 1
    #endif
#endif