[clang] [llvm] [mlir] [IR] Make semantics of strictfp consistent v2 (PR #211769)

[Ömer Sinan Ağacan via cfe-commits]

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@@ -26653,9 +26654,6 @@ point intrinsics must have the `strictfp` attribute either on the
 calling instruction or on the declaration or definition of the function
 being called.
 
-All function *definitions* that use constrained floating point intrinsics
-must have the `strictfp` attribute.
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osa1 wrote:

Ah, this clarifies so much for me. This sentence should've stayed. This PR removed an important information and added an incorrect one instead. @artagnon 

https://github.com/llvm/llvm-project/pull/211769