[llvm] [AArch64] Add costs for ROTR and ROTL. (PR #169335)

[Matthew Devereau via llvm-commits]

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@@ -349,7 +349,7 @@ entry:
 
 define i32 @rotl_i32_3rd_arg_var(i32 %a, i32 %c) {
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MDevereau wrote:

not your fault nit: I think many of these tests are named rotl when they should be rotr?

https://github.com/llvm/llvm-project/pull/169335