[LoopVectorize] Make hasVectorInstrinsicScalarOpd inline

[anemet]

Summary

VectorUtils.h needs to be included in LoopAccessAnalysis.cpp for
getIntrinsicIDForCall but hasVectorInstrinsicScalarOpd is not used by this
module.

NFC. This is part of the patchset that splits out the memory dependence logic
from LoopVectorizationLegality into a new class LoopAccessAnalysis.
LoopAccessAnalysis will be used by the new Loop Distribution pass.

[hfinkel]

LGTM.

[anemet]

r227753

include/llvm/Transforms/Utils/VectorUtils.h

static inline bool isTriviallyVectorizable(Intrinsic::ID ID) {
   case Intrinsic::cttz:
   case Intrinsic::powi:
     return true;
   default:
     return false;
   }
 }
 
-static bool hasVectorInstrinsicScalarOpd(Intrinsic::ID ID,
+static inline bool hasVectorInstrinsicScalarOpd(Intrinsic::ID ID,
                                          unsigned ScalarOpdIdx) {
   switch (ID) {
     case Intrinsic::ctlz:
     case Intrinsic::cttz:
     case Intrinsic::powi:
       return (ScalarOpdIdx == 1);
     default:
       return false;