test: v4l2_videodevice: Switch to FrameBuffer interface

The V4L2VideoDevice class can now operate using a FrameBuffer interface,
switch all test cases to use it.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

test/v4l2_videodevice/stream_on_off.cpp

@@ -17,10 +17,8 @@ protected:
 	{
 		const unsigned int bufferCount = 8;
 
-		pool_.createBuffers(bufferCount);
-
-		int ret = capture_->exportBuffers(&pool_);
-		if (ret)
+		int ret = capture_->exportBuffers(bufferCount, &buffers_);
+		if (ret < 0)
 			return TestFail;
 
 		ret = capture_->streamOn();