[clang] [flang] [mlir] [flang,acc] Support -ffp-maxmin-behavior option in lowering. (PR #184730)

[Tarun Prabhu via cfe-commits]

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@@ -88,5 +88,9 @@ ENUM_LOWERINGOPT(RegisterMLIRDiagnosticsHandler, unsigned, 1, 1)
 /// LineTablesOnly. Off by default.
 ENUM_LOWERINGOPT(PreserveUseDebugInfo, unsigned, 1, 0)
 
+/// FP max/min behavior for MAX/MIN intrinsics and [max|min][loc|val] (Legacy,
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tarunprabhu wrote:

It may be good to be consistent with casing, unless the difference in casing highlights something else.

```suggestion
/// FP max/min behavior for max/min intrinsics and [max|min][loc|val] (Legacy,
```

https://github.com/llvm/llvm-project/pull/184730