[RISCV] Don't enable Interleaved Access Vectorization

[luke957]

Summary

The patch https://reviews.llvm.org/D101469 is intended to enable loop unrolling, not interleaved access vectorization. The method bool enableInterleavedAccessVectorization() should not be implemented.

[craig.topper]

LGTM

llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h

     }
   }
 
-  bool enableInterleavedAccessVectorization() { return true; }
   unsigned getMaxInterleaveFactor(unsigned VF) {
     return ST->getMaxInterleaveFactor();
   }