Automerge: [AArch64] (NFC) Tidy up alignment/formatting in AArch64/AArch64InstrInfo.td (#163645)

It was noted in a code-review for earlier changes in this stack
that some of the new 9.7 entries were mis-aligned. But actually,
many of the entries were, so I've tidied them all up.

Author: jthackray