[clang] [llvm] [ARM] Armv8-R does not require fp64 or neon. (PR #88287)

[Chris Copeland via cfe-commits]

chrisnc wrote:

Added an item to the release notes and fixed another place where fp64+neon was being added (the target parser); now I see the expected results when using just armv8r-none-eabi (sans -mcpu=cortex-r52).

https://github.com/llvm/llvm-project/pull/88287