fix -Wstrict-prototypes issues

porting/npl/linux/test/test_npl_callout.c

@@ -56,7 +56,7 @@ void on_callout(struct ble_npl_event *ev)
  * ble_npl_callout_init(struct ble_npl_callout *c, struct ble_npl_eventq *evq,
  *                 ble_npl_event_fn *ev_cb, void *ev_arg)
  */
-int test_init()
+int test_init(void)
 {
     ble_npl_callout_init(&s_callout,
 		    &s_eventq,
@@ -65,19 +65,19 @@ int test_init()
     return PASS;
 }
 
-int test_queued()
+int test_queued(void)
 {
   //VerifyOrQuit(ble_npl_callout_queued(&s_callout),
   //	 "callout: not queued when expected");
     return PASS;
 }
 
-int test_reset()
+int test_reset(void)
 {
     return ble_npl_callout_reset(&s_callout, TEST_INTERVAL);
 }
 
-int test_stop()
+int test_stop(void)
 {
     return PASS;
 }

porting/npl/linux/test/test_npl_eventq.c

@@ -58,7 +58,7 @@ void on_event(struct ble_npl_event *ev)
     s_tests_running = false;
 }
 
-int test_init()
+int test_init(void)
 {
     //VerifyOrQuit(!ble_npl_eventq_inited(&s_eventq), "eventq: empty q initialized");
     ble_npl_eventq_init(&s_eventq);
@@ -67,7 +67,7 @@ int test_init()
     return PASS;
 }
 
-int test_run()
+int test_run(void)
 {
     while (s_tests_running)
     {
@@ -77,7 +77,7 @@ int test_run()
     return PASS;
 }
 
-int test_put()
+int test_put(void)
 {
     s_event.ev_cb = on_event;
     s_event.ev_arg = &s_event_args;
@@ -85,13 +85,13 @@ int test_put()
     return PASS;
 }
 
-int test_get_no_wait()
+int test_get_no_wait(void)
 {
     //struct ble_npl_event *ev = ble_npl_eventq_get_no_wait(&s_eventq);
     return FAIL;
 }
 
-int test_get()
+int test_get(void)
 {
     struct ble_npl_event *ev = ble_npl_eventq_get(&s_eventq,
 						  BLE_NPL_WAIT_FOREVER);

porting/npl/linux/test/test_npl_mempool.c

@@ -37,7 +37,7 @@ static void *s_memblock[TEST_MEMPOOL_BLOCKS];
  *                            int block_size, void *membuf, char *name);
  *
  */
-int test_init()
+int test_init(void)
 {
     int err;
     err = ble_npl_mempool_init(NULL,
@@ -60,7 +60,7 @@ int test_init()
  *
  * bool ble_npl_mempool_is_sane(const struct ble_npl_mempool *mp);
  */
-int test_is_sane()
+int test_is_sane(void)
 {
     return (ble_npl_mempool_is_sane(&s_mempool)) ? PASS : FAIL;
 }
@@ -75,7 +75,7 @@ int test_is_sane()
  *
  * int ble_npl_memblock_from(const struct ble_npl_mempool *mp, const void *block_addr);
  */
-int test_stress()
+int test_stress(void)
 {
     int loops = 3;
     while(loops--)

porting/npl/linux/test/test_npl_task.c

@@ -67,7 +67,7 @@ void *task1_run(void *args)
  *                  ble_npl_stack_t *stack_bottom, uint16_t stack_size)
  *
  */
-int test_init()
+int test_init(void)
 {
     int err;
     err = ble_npl_task_init(NULL,