[MLIR] Add subf and rsqrt EDSC intrinsics

[ezhulenev]

Summary

[MLIR] Add subf and rsqrt EDSC intrinsics

NOTE: Please merge it when ready.

mlir/include/mlir/Dialect/StandardOps/EDSC/Intrinsics.h

 using std_fptrunc = ValueBuilder<FPTruncOp>;
 using std_im = ValueBuilder<ImOp>;
 using std_index_cast = ValueBuilder<IndexCastOp>;
 using std_muli = ValueBuilder<MulIOp>;
 using std_mulf = ValueBuilder<MulFOp>;
 using std_memref_cast = ValueBuilder<MemRefCastOp>;
 using std_re = ValueBuilder<ReOp>;
 using std_ret = OperationBuilder<ReturnOp>;
+using std_rsqrt = ValueBuilder<RsqrtOp>;
 using std_select = ValueBuilder<SelectOp>;
 using std_load = ValueBuilder<LoadOp>;
 using std_splat = ValueBuilder<SplatOp>;
 using std_store = OperationBuilder<StoreOp>;
+using std_subf = ValueBuilder<SubFOp>;
 using std_subi = ValueBuilder<SubIOp>;
 using std_sub_view = ValueBuilder<SubViewOp>;
 using std_tanh = ValueBuilder<TanhOp>;
 using std_tensor_load = ValueBuilder<TensorLoadOp>;
 using std_tensor_store = OperationBuilder<TensorStoreOp>;
 using std_view = ValueBuilder<ViewOp>;
 using std_zero_extendi = ValueBuilder<ZeroExtendIOp>;
 using std_sign_extendi = ValueBuilder<SignExtendIOp>;