stream: rename _drive() to _trigger_process()

Should be a bit more intuitive to understand what it will do.

src/examples/video-play-pull.c

@@ -284,7 +284,7 @@ on_stream_io_changed(void *_data, uint32_t id, void *area, uint32_t size)
 static void on_timeout(void *userdata, uint64_t expirations)
 {
 	struct data *data = userdata;
-	pw_stream_drive(data->stream);
+	pw_stream_trigger_process(data->stream);
 }
 
 /* Be notified when the stream param changes. We're only looking at the

src/examples/video-src-alloc.c

@@ -181,7 +181,7 @@ static void on_timeout(void *userdata, uint64_t expirations)
 {
 	struct data *data = userdata;
 	pw_log_trace("timeout");
-	pw_stream_drive(data->stream);
+	pw_stream_trigger_process(data->stream);
 }
 
 /* when the stream is STREAMING, start the timer at 40ms intervals

src/examples/video-src-reneg.c

@@ -185,7 +185,7 @@ static void on_timeout(void *userdata, uint64_t expirations)
 {
 	struct data *data = userdata;
 	pw_log_trace("timeout");
-	pw_stream_drive(data->stream);
+	pw_stream_trigger_process(data->stream);
 }
 
 /* when the stream is STREAMING, start the timer at 40ms intervals

src/examples/video-src.c

@@ -178,7 +178,7 @@ static void on_timeout(void *userdata, uint64_t expirations)
 {
 	struct data *data = userdata;
 	pw_log_trace("timeout");
-	pw_stream_drive(data->stream);
+	pw_stream_trigger_process(data->stream);
 }
 
 static void on_stream_state_changed(void *_data, enum pw_stream_state old, enum pw_stream_state state,