With ref to resize bilinear operation discussion @ https://github.com/dmlc/nnvm/pull/472
upsampling with args layout (NCHW or NHWC), scale (integer)
To be considered with Bilinear:
1: mode (new arg): To choose NN or BILINEAR
2: scale (modify): Make it a tuple to support asymetric scaling.
1: Do we rename upsampling -> scale (ideally it enlarge or squeeze the input) ?
2: Scale factor or output resolution (Just thinking scale factor would be too fractional for minor change in output intended resolution)?
Convolution approach for bilinear scaling (Ref: https://github.com/dmlc/tvm/pull/772).