Update LSR test case

A regression, but only since #96200. This just brings us back to square one.

Author: lukel97

llvm/test/Transforms/LoopStrengthReduce/RISCV/lsr-drop-solution.ll

@@ -20,6 +20,7 @@ define ptr @foo(ptr %a0, ptr %a1, i64 %a2) {
 ; CHECK-NEXT:    mv a3, a0
 ; CHECK-NEXT:  .LBB0_3: # %do.body
 ; CHECK-NEXT:    # =>This Inner Loop Header: Depth=1
+; CHECK-NEXT:    vsetvli zero, a4, e8, m8, ta, ma
 ; CHECK-NEXT:    vle8.v v8, (a1)
 ; CHECK-NEXT:    vse8.v v8, (a3)
 ; CHECK-NEXT:    add a3, a3, a4