[NNPA] Fix some bugs for ReduceMin/Max

[tungld]

Currently, ReduceMin/ReduceMax failed to run on NNPA. This patch is to make them work and produce correct results.

Test program:

module {
  func.func @main_graph(%arg0: tensor<3x2x2xf32> {onnx.name = "x"}) -> (tensor<*xf32> {onnx.name = "y"}) {
   %cst = "onnx.Constant"() {value = dense<[2]> : tensor<1xi64> } : () -> tensor<1xi64>
   %0 ="onnx.ReduceMax"(%arg0, %cst) {keepdims = 1 : si64, noop_with_empty_axes = 0 : si64} : (tensor<3x2x2xf32>, tensor<1xi64>)-> tensor<*xf32>
   "func.return"(%0) : (tensor<*xf32>) -> ()
  }
  "onnx.EntryPoint"() {func = @main_graph} : () -> ()
}

Output using this patch:

python ../utils/RunONNXModel.py -m reducemax.mlir -c "-O3 -march=arch15 -maccel=NNPA" --print-input --print-output
Temporary directory has been created at <TemporaryDirectory '/tmp/tmpxs_l058r'>

Compiling the model ...
  took  0.14967317699847626  seconds.

Loading the compiled model ...
  took  0.0001287180020881351  seconds.

Generating random inputs using seed 42 ...
  - 1st input's shape (3, 2, 2), element type float32. Value ranges [-0.1, 0.1]
  done.

The 1st input x:[3x2x2xfloat32] is:
 [[[-0.02509198  0.09014286]
  [ 0.04639879  0.0197317 ]]

 [[-0.06879627 -0.0688011 ]
  [-0.08838328  0.07323523]]

 [[ 0.020223    0.04161451]
  [-0.0958831   0.09398197]]]

Running inference ...
  1st iteration, 8.331799836014397e-05, seconds
The 1st output y:[3x2x1xfloat32] is:
 [[[ 0.09008789]
  [ 0.04638672]]

 [[-0.06884766]
  [ 0.07324219]]

 [[ 0.04162598]
  [ 0.09399414]]]

[hamptonm1]

LGTM

[tungld]

@jenkins-droid test this please

[jenkins-droid]

Jenkins Linux s390x Build #16110 [push] Fix some bugs for Reduce... started at 23:00

[jenkins-droid]

Jenkins Linux ppc64le Build #15137 [push] Fix some bugs for Reduce... started at 23:18

[jenkins-droid]

Jenkins Linux amd64 Build #16108 [push] Fix some bugs for Reduce... started at 22:00

[jenkins-droid]

Jenkins Linux amd64 Build #16108 [push] Fix some bugs for Reduce... passed after 1 hr 26 min

[jenkins-droid]

Jenkins Linux s390x Build #16110 [push] Fix some bugs for Reduce... passed after 1 hr 41 min

[jenkins-droid]

Jenkins Linux ppc64le Build #15137 [push] Fix some bugs for Reduce... passed after 2 hr 30 min