[llvm] [DAGCombiner][AArch64] Fix incorrect cast VT in `takeInexpensiveLog2` (PR #67161)

[via llvm-commits]

goldsteinn wrote:

Pushed this with: https://github.com/llvm/llvm-project/commit/bc38c427d454d3ae1e38c97c5c03cf372882a13f guess messed up linking the PR <-> commit. But closing.

https://github.com/llvm/llvm-project/pull/67161