fixup: Alphabetize cmake file

Author: djtodoro

llvm/lib/Target/RISCV/CMakeLists.txt

@@ -47,8 +47,8 @@ add_llvm_target(RISCVCodeGen
   RISCVISelDAGToDAG.cpp
   RISCVISelLowering.cpp
   RISCVLandingPadSetup.cpp
-  RISCVMachineFunctionInfo.cpp
   RISCVLoadStoreOptimizer.cpp
+  RISCVMachineFunctionInfo.cpp
   RISCVMergeBaseOffset.cpp
   RISCVOptWInstrs.cpp
   RISCVPostRAExpandPseudoInsts.cpp