[llvm] [RISCV] add load/store misched/PostRA cluster options (PR #149409)

[Pengcheng Wang via llvm-commits]

================
@@ -94,14 +94,24 @@ static cl::opt<bool>
                            cl::desc("Enable the loop data prefetch pass"),
                            cl::init(true));
 
-static cl::opt<bool> EnableMISchedLoadStoreClustering(
-    "riscv-misched-load-store-clustering", cl::Hidden,
-    cl::desc("Enable load and store clustering in the machine scheduler"),
+static cl::opt<bool> EnableMISchedLoadClustering(
----------------
wangpc-pp wrote:

Yeah, make sense to me.

https://github.com/llvm/llvm-project/pull/149409