Update batchedNMS plugin to IPluginV2DynamicExt (#738)

Signed-off-by: Rajeev Rao <rajeevrao@nvidia.com>

Author: rajeevsrao

plugin/InferPlugin.cpp

@@ -158,6 +158,7 @@ bool initLibNvInferPlugins(void* logger, const char* libNamespace)
 {
     initializePlugin<nvinfer1::plugin::BatchTilePluginCreator>(logger, libNamespace);
     initializePlugin<nvinfer1::plugin::BatchedNMSPluginCreator>(logger, libNamespace);
+    initializePlugin<nvinfer1::plugin::BatchedNMSDynamicPluginCreator>(logger, libNamespace);
     initializePlugin<nvinfer1::plugin::CoordConvACPluginCreator>(logger, libNamespace);
     initializePlugin<nvinfer1::plugin::CropAndResizePluginCreator>(logger, libNamespace);
     initializePlugin<nvinfer1::plugin::DetectionLayerPluginCreator>(logger, libNamespace);

plugin/README.md

@@ -6,6 +6,7 @@
 |---|---|---|
 | [batchTilePlugin](batchTilePlugin) | BatchTilePlugin_TRT | 1 |
 | [batchedNMSPlugin](batchedNMSPlugin) | BatchedNMS_TRT | 1 |
+| [batchedNMSDynamicPlugin](batchedNMSPlugin) | BatchedNMSDynamic_TRT | 1 |
 | [bertQKVToContextPlugin](bertQKVToContextPlugin) | CustomQKVToContextPluginDynamic | 1 |
 | [coordConvACPlugin](coordConvACPlugin) | CoordConvAC | 1 |
 | [cropAndResizePlugin](cropAndResizePlugin) | CropAndResize | 1 |