[clang] [Driver] Pass correct alignment for -falign-functions with no argument (PR #101257)

[Paul T Robinson via cfe-commits]

pogo59 wrote:

The driver can't really be poking down into LLVM's TargetLowering; at best it could be querying Clang's TargetInfo, which knows a lot about data alignment but does not currently have any knowledge of code alignment. So, I've reverted the change and instead fixed the incorrect comment.

https://github.com/llvm/llvm-project/pull/101257