Documents manual TE schedule to illustrate Hexagon operator slicing.

High Level Notes:

• Using float32 (for now) so that tests will pass on CPU
• Using global storage scope (for now) which means “cache” reads and writes from global, to global
• TIR is pending changes from the work-in-progress layout RFC (https://github.com/apache/tvm-rfcs/pull/39)
• TIR has been hand-edited for context and clarity
  • Added C-style comments
  • Changed variable names
  • Added spacing and line breaks
• Naming conventions
  • Using input (instead of activation)
  • Using filter (instead of weight, kernel)
  • Using k to denote channel-out and c or rc (reduction channel) to denote channel-in
  • Using rh and rw (reduction height / width) to denote filter height and width

Conv2d

Conv2d -> Conv2d