videoout: register buffers in texture cache at VO creation time

src/core/libraries/videoout/driver.cpp

@@ -134,6 +134,7 @@ int VideoOutDriver::RegisterBuffers(VideoOutPort* port, s32 startIndex, void* co
             .address_right = 0,
         };
 
+        renderer->RegisterVideoOutSurface(group, address);
         LOG_INFO(Lib_VideoOut, "buffers[{}] = {:#x}", i + startIndex, address);
     }