[clang] [clang][ARM] Fix warning for VFP function calls from interrupts. (PR #91870)

[David Spickett via cfe-commits]

DavidSpickett wrote:

> I'd like to also address https://github.com/llvm/llvm-project/issues/47815, but I wasn't able to find the right path to answer "is this M-profile" from TargetInfo.

Any ARM folks know if there are existing M profile only warnings to learn from?

https://github.com/llvm/llvm-project/pull/91870