[VTA] [Chisel] support for different inp/wgt bits, rewrote DotProduct for clarity...

[VTA] [Chisel] support for different inp/wgt bits, rewrote DotProduct for clarity (#3605)

* support for different inp/wgt bits, rewrote dot for clarity

* [VTA] [Chisel] support for different inp/wgt bits, rewrote DotProduct for clarity

* [VTA] [Chisel] support for different inp/wgt bits, rewrote DotProduct for clarity

* change back to sim

* fix index

* fix index

* fix indent

* fix indent

* fix indent

* fix trailing spaces

* fix trailing spaces

* change to more descriptive name

* matric->matrix

* fix spacing

* fix spacing & added generic name for dot

* better parameter flow

* spacing

* spacing

* spacing

* update requirement (tested) for dot, spacing

* function call convention

* small edit