This patch consolidates the two transform ops from the affine dialect
and the scf dialect to avoid code duplication.
This is to address the review comments from
https://reviews.llvm.org/D137997.
The transform ops directory / file structure for the affine dialect is
kept for the purpose of forth-coming transform ops
for affine, but get_parent_for and unroll are removed.
Reviewed By: nicolasvasilache
Differential Revision: https://reviews.llvm.org/D138980
Create the directory and file structures to support transform ops for
the affine dialect in the future. Enable affine.unroll and affine.get_parent_for
transform operations in this first batch of check in.
Reviewed By: ftynse
Differential Revision: https://reviews.llvm.org/D137997
