[LoongArch] Disable mulodi4 and muloti4 libcalls (#73199)

This library function only exists in compiler-rt not libgcc. So this
would fail to link unless we were linking with compiler-rt.

Fixes ClangBuiltLinux/linux#1958

Author: heiher

llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp

@@ -152,8 +152,13 @@ LoongArchTargetLowering::LoongArchTargetLowering(const TargetMachine &TM,
 
     // Set libcalls.
     setLibcallName(RTLIB::MUL_I128, nullptr);
+    // The MULO libcall is not part of libgcc, only compiler-rt.
+    setLibcallName(RTLIB::MULO_I64, nullptr);
   }
 
+  // The MULO libcall is not part of libgcc, only compiler-rt.
+  setLibcallName(RTLIB::MULO_I128, nullptr);
+
   setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Custom);
 
   static const ISD::CondCode FPCCToExpand[] = {