Improve reduction schedule on arm CPUs (#6110)
Improve reduction schedule on arm CPUs (#6110)

* Improve reduction schedule on arm CPUs

Change-Id: I9cd85deac6a57666b82ff7250d827652a4000d82

* Retrigger CI

Change-Id: I5efd99e34268e6bb990904a4b98e1edf2174b26b
sxjscience/tvm,Laurawly/tvm-1,tqchen/tvm,tqchen/tvm,dmlc/tvm,dmlc/tvm,dmlc/tvm,Laurawly/tvm-1,sxjscience/tvm,dmlc/tvm,sxjscience/tvm,dmlc/tvm,sxjscience/tvm,Laurawly/tvm-1,sxjscience/tvm,Laurawly/tvm-1,sxjscience/tvm,tqchen/tvm,Laurawly/tvm-1,tqchen/tvm,sxjscience/tvm,dmlc/tvm,tqchen/tvm,sxjscience/tvm,Laurawly/tvm-1,Laurawly/tvm-1,tqchen/tvm,dmlc/tvm,tqchen/tvm,Laurawly/tvm-1,sxjscience/tvm,dmlc/tvm,dmlc/tvm,tqchen/tvm,tqchen/tvm,Laurawly/tvm-1,Laurawly/tvm-1,tqchen/tvm