[llvm] [MCA][AArch64] Fixes Neoverse N2 pair-load RThroughput (PR #171853)

[Asher Dobrescu via llvm-commits]

https://github.com/Asher8118 commented:

Hi Amina, looks good, I do have one question, do you know where the changes in `N2-writebacks.s` are coming from? Not all of them seem related to your patch. Specifically I am looking at Code Regions G10, G11, G12, G13, G21 and so on. I think Code Block G46 was the first I found to be related.

nit: Could you change your patch title from "Fixes" to "Fix" ? 

https://github.com/llvm/llvm-project/pull/171853