Fix sample_d_c_mlod in irbuilder

Fixed type arguments used to create a GenISA_sampleDCMlodptr call.
The Mlod argument's type is not set via argument; it takes on the type
of the ref parameter.

Author: davidjwoo

IGC/LLVM3DBuilder/BuiltinsFrontendDefinitions.hpp

@@ -2165,7 +2165,6 @@ inline llvm::CallInst* LLVM3DBuilder<preserveNames, T, Inserter>::Create_SAMPLED
     llvm::Type* types[] = {
         IGCLLVM::FixedVectorType::get(dstType, 4),
         float_ref->getType(),
-        minlod->getType(),
         int32_pairedTextureIdx->getType(),
         int32_textureIdx->getType(),
         int32_sampler->getType()