Update KL Divergence formula (#16170)
Update KL Divergence formula (#16170)

* Update KL Divergence formula

Errors fix.

* remove initial error

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