Unify/Simplify SystolicArrayConfig

[vighneshiyer]

Currently some config parameters (like block_size, sp_bank_entries, sp_width) in SystolicArrayConfig are dependent on prior parameters and can be computed internally. Remove the unnecessary assertions in Controller.scala once this is done.

Also, the datatype (inner_type) of the systolic array is being passed in to the top-level; could we move that to the Config object if possible?

[hngenc]

Parameters like block_size, sp_bank_entries, and sp_width, are no longer inputs to the config class, and all datatypes have now been folded into it.