[clang] [llvm] [Hexagon] NFC: Reduce the amount of version-specific code (PR #145812)

[Qinkun Bao via llvm-commits]

qinkunbao wrote:

Hi, can you take a look at the buildbot?
https://lab.llvm.org/buildbot/#/builders/94/builds/8380



https://github.com/llvm/llvm-project/pull/145812