implemented counting semaph for linux

osal/FreeRTOS/CountingSemaphore.h

@@ -25,6 +25,7 @@ public:
 	/* Same API as binary semaphore otherwise. acquire() can be called
 	 * until there are not semaphores left and release() can be called
 	 * until maxCount is reached. */
+	uint8_t getMaxCount() const;
 private:
 	const uint8_t maxCount;
 	uint8_t initCount = 0;