Fix MathTransforms library dependencies

The dependencies were set up improperly likely due to past code
locations. MathTransforms shouldn't depend on VectorUtils which add a
whole bunch of additional dependencies; it instead depends on the SCF
dialect.

Differential Revision: https://reviews.llvm.org/D149797

Author: bondhugula

mlir/lib/Dialect/Math/Transforms/CMakeLists.txt

@@ -8,12 +8,12 @@ add_mlir_dialect_library(MLIRMathTransforms
 
   LINK_LIBS PUBLIC
   MLIRArithDialect
-  MLIRDialectUtils  
+  MLIRDialectUtils
   MLIRIR
   MLIRMathDialect
+  MLIRSCFDialect
   MLIRPass
   MLIRTransforms
   MLIRX86VectorDialect
   MLIRVectorDialect
-  MLIRVectorUtils
   )