[llvm] [RISCV] Enable shouldMaximizeVectorBandwidth (PR #216005)

[Elvis Wang via llvm-commits]

ElvisWang123 wrote:

FYI, we found an issue in downstream that RISCV VL optimizer not working well when vector split. This may cause some regressions when enabling max-bandwidth (which may generate more vector split). https://github.com/llvm/llvm-project/issues/216935


https://github.com/llvm/llvm-project/pull/216005