[mlir] Fix -Wdeprecated-declarations of cast in VCIXToLLVMIRTranslation.cpp (NFC)

In file included from /llvm-project/mlir/lib/Target/LLVMIR/Dialect/VCIX/VCIXToLLVMIRTranslation.cpp:70:
/llvm-project/build-Release/tools/mlir/include/mlir/Dialect/LLVMIR/VCIXConversions.inc:8:48: error: 'cast' is deprecated: Use mlir::cast<U>() instead [-Werror,-Wdeprecated-declarations]
      VectorType vt = op.getResult().getType().cast<VectorType>();
                                               ^
/llvm-project/mlir/include/mlir/IR/Types.h:345:9: note: 'cast' has been explicitly marked deprecated here
U Type::cast() const {
        ^
In file included from /llvm-project/mlir/lib/Target/LLVMIR/Dialect/VCIX/VCIXToLLVMIRTranslation.cpp:70:
/llvm-project/build-Release/tools/mlir/include/mlir/Dialect/LLVMIR/VCIXConversions.inc:8:48: error: 'cast<mlir::VectorType>' is deprecated: Use mlir::cast<U>() instead [-Werror,-Wdeprecated-declarations]
      VectorType vt = op.getResult().getType().cast<VectorType>();
                                               ^
/llvm-project/mlir/include/mlir/IR/Types.h:112:5: note: 'cast<mlir::VectorType>' has been explicitly marked deprecated here
  [[deprecated("Use mlir::cast<U>() instead")]]
    ^
In file included from /llvm-project/mlir/lib/Target/LLVMIR/Dialect/VCIX/VCIXToLLVMIRTranslation.cpp:70:
/llvm-project/build-Release/tools/mlir/include/mlir/Dialect/LLVMIR/VCIXConversions.inc:32:48: error: 'cast' is deprecated: Use mlir::cast<U>() instead [-Werror,-Wdeprecated-declarations]
      VectorType vt = op.getResult().getType().cast<VectorType>();
                                               ^
/llvm-project/mlir/include/mlir/IR/Types.h:345:9: note: 'cast' has been explicitly marked deprecated here
U Type::cast() const {
        ^
In file included from /llvm-project/mlir/lib/Target/LLVMIR/Dialect/VCIX/VCIXToLLVMIRTranslation.cpp:70:
/llvm-project/build-Release/tools/mlir/include/mlir/Dialect/LLVMIR/VCIXConversions.inc:32:48: error: 'cast<mlir::VectorType>' is deprecated: Use mlir::cast<U>() instead [-Werror,-Wdeprecated-declarations]
      VectorType vt = op.getResult().getType().cast<VectorType>();
                                               ^
/llvm-project/mlir/include/mlir/IR/Types.h:112:5: note: 'cast<mlir::VectorType>' has been explicitly marked deprecated here
  [[deprecated("Use mlir::cast<U>() instead")]]
    ^
4 errors generated.

Author: DamonFool

mlir/include/mlir/Dialect/LLVMIR/VCIXOps.td

@@ -78,7 +78,7 @@ def VCIX_BinaryImmOp : VCIX_Op<"v.iv">,
           xlen, $opcode, $_location, moduleTranslation);
       llvm::Value *immConst = mlir::LLVM::detail::getLLVMConstant(
           xlen, $imm, $_location, moduleTranslation);
-      VectorType vt = op.getResult().getType().cast<VectorType>();
+      VectorType vt = mlir::cast<VectorType>(op.getResult().getType());
       llvm::Value *vl =
           createVL(builder, $vl, vt, xlen, $_location, moduleTranslation);
       $res = createIntrinsicCall(
@@ -120,7 +120,7 @@ def VCIX_BinaryOp : VCIX_Op<"v.sv">,
       } else {
         id = llvm::Intrinsic::riscv_sf_vc_v_fv_se;
       }
-      VectorType vt = op.getResult().getType().cast<VectorType>();
+      VectorType vt = mlir::cast<VectorType>(op.getResult().getType());
       llvm::Value *vl =
           createVL(builder, $vl, vt, xlen, $_location, moduleTranslation);
       $res = createIntrinsicCall(