[riscv64] Implement emit_i8x16_relaxed_swizzle

Change-Id: Ie6c88a0e371b2ce0bfad6ac887168e08fce26c05
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3662541
Commit-Queue: ji qiu <qiuji@iscas.ac.cn>
Auto-Submit: Yahan Lu <yahan@iscas.ac.cn>
Reviewed-by: ji qiu <qiuji@iscas.ac.cn>
Cr-Commit-Position: refs/heads/main@{#80704}

src/codegen/riscv64/assembler-riscv64.cc

@@ -2913,7 +2913,6 @@ uint8_t vsew_switch(VSew vsew) {
 
 void Assembler::vl(VRegister vd, Register rs1, uint8_t lumop, VSew vsew,
                    MaskType mask) {
-  std::cout << "vl" << std::endl;
   uint8_t width = vsew_switch(vsew);
   GenInstrV(LOAD_FP, width, vd, rs1, lumop, mask, 0b00, 0, 0b000);
 }

src/wasm/baseline/riscv64/liftoff-assembler-riscv64.h

@@ -1940,7 +1940,7 @@ void LiftoffAssembler::emit_i8x16_swizzle(LiftoffRegister dst,
 void LiftoffAssembler::emit_i8x16_relaxed_swizzle(LiftoffRegister dst,
                                                   LiftoffRegister lhs,
                                                   LiftoffRegister rhs) {
-  bailout(kSimd, "emit_i8x16_relaxed_swizzle");
+  emit_i8x16_swizzle(dst, lhs, rhs);
 }
 
 void LiftoffAssembler::emit_s128_relaxed_laneselect(LiftoffRegister dst,