[AArch64][llvm] Relax mandatory features for Armv9.6-A#163973

jthackray wants to merge 1 commit intousers/jthackray/fix_alignment_nitsllvm/llvm-project:users/jthackray/fix_alignment_nitsfrom

users/jthackray/arm_feat_relaxationsllvm/llvm-project:users/jthackray/arm_feat_relaxationsCopy head branch name to clipboard