fix vector scratch reg check failed

Change-Id: I948d17b34334caae9deb9282176a76e6be3d28a3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3443174Reviewed-by: ji qiu <qiuji@iscas.ac.cn>
Commit-Queue: ji qiu <qiuji@iscas.ac.cn>
Cr-Commit-Position: refs/heads/main@{#78987}

src/codegen/riscv64/register-riscv64.h

@@ -379,8 +379,8 @@ constexpr Register kWasmInstanceRegister = a0;
 constexpr Register kWasmCompileLazyFuncIndexRegister = t0;
 
 constexpr DoubleRegister kFPReturnRegister0 = fa0;
-constexpr VRegister kSimd128ScratchReg = v23;
-constexpr VRegister kSimd128ScratchReg2 = v24;
+constexpr VRegister kSimd128ScratchReg = v24;
+constexpr VRegister kSimd128ScratchReg2 = v23;
 constexpr VRegister kSimd128ScratchReg3 = v8;
 constexpr VRegister kSimd128RegZero = v25;