* - add fused_op.td to CmakeLists
- define pattern to fuse Wx + b and to replace with MatMulBias

* - remove table-gen LLVM_TARGET_DEFINATION for fused_ops_pattern.td,
fused_ops.td
- fix build issues

* - change pattern to to match MatMul instead of Dot
- support in CMake to register MatMulBias fused Op pattern

* - made changes to fusion pattern to match Add( Dot (op1, op2), bias) for
MatmulBias
- use applyPatternsGreedily instead of applyFullConversion in the graph
pass
- add unit test inter v/s CPU for MatMulBias

* - Affine lowering, verifier logic to NgMatMulBiasOp

* add missing header file

* - WIP, use NGGemm instead of NGMatMulBias

* -undo unintended changes

* Addressed PR comments

* - refactor the ctor of the NgDialectFusion pass
- register NgDialectFusion pass with the PassRegistration

* Address PR comments

* -add lit test for matmul+bias fusion

* -style fix lit test
Co-authored-by: Sang Ik Lee <sang.ik.lee@intel.com>