fixup! [RISCV] Enable LoopDataPrefetch pass

Remove -riscv-enable-loop-data-prefetch

Author: wangpc-pp

llvm/test/Transforms/LoopDataPrefetch/RISCV/basic.ll

@@ -1,6 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
-; RUN: opt -mtriple=riscv64 -riscv-enable-loop-data-prefetch \
-; RUN:   -cache-line-size=64 -prefetch-distance=64 \
+; RUN: opt -mtriple=riscv64 -cache-line-size=64 -prefetch-distance=64 \
 ; RUN:   -passes=loop-data-prefetch -S < %s | FileCheck %s
 
 define void @foo(ptr nocapture %a, ptr nocapture readonly %b) {