[RFC] Use CMSIS-NN with TVM

[asparkhi]

This RFC details integration of CMSIS-NN API into TVM to support code generation for Arm(R) Cortex-M using the following library: https://github.com/ARM-software/CMSIS_5/tree/develop/CMSIS/NN

cc : @areusch @mbaret @tqchen @Mousius @manupa-arm

[u99127]

Minor nit - the title of the RFC should really read - [RFC] Use CMSIS-NN with TVM.

@manupa-arm , @Mousius ..

[leandron]

Just a few nits here and there. Generally looks very good.

[leandron]

A couple of other acronyms.

[tqchen]

Would be great to update the RFC naming per #17. cc @comaniac @zhiics who might have some insights from BYOC and @echuraev who might draw some parallels from Apple lib integration

[comaniac]

Overall LGTM. One thing I'm a little bit worry about is this RFC depends on another two RFCs (target hook and Ethos-U integration). I would be better if this RFC can also discuss the impact and alternative plan without other 2 RFCs so that this RFC won't be blocked.

[areusch]

@ashutosh-arm apologies for the delay! just a few points to clarify here.

[areusch]

@ashutosh-arm i did another round here to clarify your intentions. i think this should be the bulk of my questions on this RFC

[areusch]

Merging as Cody said LGTM in his last review