[TOPI] Allow batch matmul to be fused into injective ops (#4537)
[TOPI] Allow batch matmul to be fused into injective ops (#4537)


sxjscience/tvm,Laurawly/tvm-1,tqchen/tvm,Laurawly/tvm-1,dmlc/tvm,tqchen/tvm,dmlc/tvm,tqchen/tvm,sxjscience/tvm,sxjscience/tvm,tqchen/tvm,tqchen/tvm,Laurawly/tvm-1,Laurawly/tvm-1,sxjscience/tvm,tqchen/tvm,sxjscience/tvm,tqchen/tvm,tqchen/tvm,dmlc/tvm,sxjscience/tvm,Laurawly/tvm-1,dmlc/tvm,tqchen/tvm,tqchen/tvm,dmlc/tvm,Laurawly/tvm-1,Laurawly/tvm-1,sxjscience/tvm,sxjscience/tvm,Laurawly/tvm-1,dmlc/tvm,dmlc/tvm,dmlc/tvm,Laurawly/tvm-1,sxjscience/tvm,Laurawly/tvm-1,dmlc/tvm