add spi deinit for sleep

include/spislave.h

@@ -27,10 +27,10 @@ licenses. Refer to LICENSE.txt file in repository for more details.
 #include "globals.h"
 #include "rcommand.h"
 
-esp_err_t spi_init();
-
 extern TaskHandle_t spiTask;
 
+esp_err_t spi_init();
+void spi_deinit(void);
 void spi_enqueuedata(MessageBuffer_t *message);
 uint32_t spi_queuewaiting(void);
 void spi_queuereset(void);