[llvm] [AArch64][SME] Allow memory operations lowering to custom SME functions. (PR #79263)

[Sander de Smalen via llvm-commits]

================
@@ -15,6 +15,12 @@ using namespace llvm;
 
 #define DEBUG_TYPE "aarch64-selectiondag-info"
 
+static cl::opt<bool>
+    EnableSMEMops("aarch64-enable-sme-mops", cl::Hidden,
----------------
sdesmalen-arm wrote:

```suggestion
    LowerToSMERoutines("aarch64-lower-to-sme-routines", cl::Hidden,
```
Better to rename this option. 'mops' has an overloaded meaning because of FEAT_MOPS.

https://github.com/llvm/llvm-project/pull/79263