[spirv] Run canonicalization and CSE after lowering affine (#8485)

iree/compiler/Codegen/SPIRV/Passes.cpp

diff --git a/iree/compiler/Codegen/SPIRV/Passes.cpp b/iree/compiler/Codegen/SPIRV/Passes.cpp
index c9ed9b3..80bb6d2 100644
--- a/iree/compiler/Codegen/SPIRV/Passes.cpp
+++ b/iree/compiler/Codegen/SPIRV/Passes.cpp
@@ -117,6 +117,8 @@
   pm.addPass(createCSEPass());
 
   pm.addPass(createLowerAffinePass());
+  pm.addPass(createCanonicalizerPass());
+  pm.addPass(createCSEPass());
 
   pm.addPass(createConvertToSPIRVPass());