[riscv64] Keep the type consistent in in_range

Change-Id: I23b76ec7bdf0f1997815f4928d903a9807413129
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3516829Reviewed-by: ji qiu <qiuji@iscas.ac.cn>
Auto-Submit: Yahan Lu <yahan@iscas.ac.cn>
Commit-Queue: Yahan Lu <yahan@iscas.ac.cn>
Cr-Commit-Position: refs/heads/main@{#79451}

src/codegen/riscv64/register-riscv64.h

@@ -300,7 +300,7 @@ class FPURegister : public RegisterBase<FPURegister, kDoubleAfterLast> {
   // this cl, in order to facilitate modification, it is assumed that the vector
   // register and floating point register are shared.
   VRegister toV() const {
-    DCHECK(base::IsInRange(code(), 0, kVRAfterLast - 1));
+    DCHECK(base::IsInRange(static_cast<int>(code()), 0, kVRAfterLast - 1));
     return VRegister(code());
   }