[llvm] [llvm][AArch64] Copy all operands when expanding BLR_BTI bundle (PR #78267)

[David Spickett via llvm-commits]

DavidSpickett wrote:

@mstorsjo I tested this using the ffmpeg commands you gave on the issue, but please run it through others if you have them.

https://github.com/llvm/llvm-project/pull/78267