Bug 1770260 - wasm: Rename references to tls in js/src/jit/mips-shared r=rhunt

Differential Revision: https://phabricator.services.mozilla.com/D146855

js/src/jit/mips-shared/Lowering-mips-shared.cpp

@@ -208,14 +208,14 @@ void LIRGeneratorMIPSShared::lowerWasmBuiltinTruncateToInt32(
 
   if (opd->type() == MIRType::Double) {
     define(new (alloc()) LWasmBuiltinTruncateDToInt32(
-               useRegister(opd), useFixed(ins->tls(), InstanceReg),
+               useRegister(opd), useFixed(ins->instance(), InstanceReg),
                LDefinition::BogusTemp()),
            ins);
     return;
   }
 
   define(new (alloc()) LWasmBuiltinTruncateFToInt32(
-             useRegister(opd), useFixed(ins->tls(), InstanceReg),
+             useRegister(opd), useFixed(ins->instance(), InstanceReg),
              LDefinition::BogusTemp()),
          ins);
 }