[clang] [llvm] [AArch64] Fix feature flags dependecies (PR #90612)

[Ahmed Bougacha via cfe-commits]

ahmedbougacha wrote:

> This patch removes FEAT_FPMR from list of available of architecture features, instead enabling FMPR register by default.

Can you expand a little bit on the reasoning?  It doesn't seem all that problematic but is still eyebrow-raising.

https://github.com/llvm/llvm-project/pull/90612