MIPS: [wasm] Allow traps in tests with many parameters in cctests

Port for: https://chromium-review.googlesource.com/c/v8/v8/+/684017

TEST=cctest/test-run-wasm-64/RunWasmCompiled_Regression_6858
BUG=

Change-Id: Ib9640853ea15d73967683c1315e6b54b5b6cc3be
Reviewed-on: https://chromium-review.googlesource.com/689794
Commit-Queue: Ivica Bogosavljevic <ivica.bogosavljevic@imgtec.com>
Reviewed-by: Ivica Bogosavljevic <ivica.bogosavljevic@imgtec.com>
Cr-Commit-Position: refs/heads/master@{#48228}

src/compiler/mips/code-generator-mips.cc

@@ -3110,6 +3110,9 @@ void CodeGenerator::AssembleArchTrap(Instruction* instr,
                              tasm()->isolate()),
                          0);
         __ LeaveFrame(StackFrame::WASM_COMPILED);
+        CallDescriptor* descriptor = gen_->linkage()->GetIncomingDescriptor();
+        int pop_count = static_cast<int>(descriptor->StackParameterCount());
+        __ Drop(pop_count);
         __ Ret();
       } else {
         gen_->AssembleSourcePosition(instr_);

src/compiler/mips64/code-generator-mips64.cc

@@ -3402,6 +3402,10 @@ void CodeGenerator::AssembleArchTrap(Instruction* instr,
                              tasm()->isolate()),
                          0);
         __ LeaveFrame(StackFrame::WASM_COMPILED);
+        CallDescriptor* descriptor = gen_->linkage()->GetIncomingDescriptor();
+        int pop_count = static_cast<int>(descriptor->StackParameterCount());
+        pop_count += (pop_count & 1);  // align
+        __ Drop(pop_count);
         __ Ret();
       } else {
         gen_->AssembleSourcePosition(instr_);