RNNOp only call cuda/cudnn if GPU ctx is requested (#16632)
RNNOp only call cuda/cudnn if GPU ctx is requested (#16632)


szha/mxnet,tlby/mxnet,sxjscience/mxnet,apache/incubator-mxnet,sxjscience/mxnet,eric-haibin-lin/mxnet,leezu/mxnet,leezu/mxnet,larroy/mxnet,sxjscience/mxnet,larroy/mxnet,yajiedesign/mxnet,ForkedReposBak/mxnet,tlby/mxnet,leezu/mxnet,leezu/mxnet,zhreshold/mxnet,DickJC123/mxnet,ForkedReposBak/mxnet,yajiedesign/mxnet,sxjscience/mxnet,apache/incubator-mxnet,zhreshold/mxnet,zhreshold/mxnet,ForkedReposBak/mxnet,tlby/mxnet,eric-haibin-lin/mxnet,leezu/mxnet,yajiedesign/mxnet,eric-haibin-lin/mxnet,szha/mxnet,DickJC123/mxnet,ForkedReposBak/mxnet,tlby/mxnet,larroy/mxnet,szha/mxnet,szha/mxnet,larroy/mxnet,ForkedReposBak/mxnet,sxjscience/mxnet,tlby/mxnet,tlby/mxnet,zhreshold/mxnet,szha/mxnet,sxjscience/mxnet,DickJC123/mxnet,szha/mxnet,yajiedesign/mxnet,ForkedReposBak/mxnet,yajiedesign/mxnet,yajiedesign/mxnet,zhreshold/mxnet,yajiedesign/mxnet,eric-haibin-lin/mxnet,apache/incubator-mxnet,yajiedesign/mxnet,eric-haibin-lin/mxnet,ForkedReposBak/mxnet,szha/mxnet,leezu/mxnet,larroy/mxnet,zhreshold/mxnet,szha/mxnet,larroy/mxnet,eric-haibin-lin/mxnet,zhreshold/mxnet,larroy/mxnet,ForkedReposBak/mxnet,tlby/mxnet,leezu/mxnet,DickJC123/mxnet,tlby/mxnet,zhreshold/mxnet,ForkedReposBak/mxnet,larroy/mxnet,eric-haibin-lin/mxnet,sxjscience/mxnet,eric-haibin-lin/mxnet,sxjscience/mxnet,larroy/mxnet,leezu/mxnet,zhreshold/mxnet,szha/mxnet,sxjscience/mxnet,tlby/mxnet,apache/incubator-mxnet,eric-haibin-lin/mxnet,leezu/mxnet,tlby/mxnet,yajiedesign/mxnet