[llvm] [AArch64] Return early rather than asserting when Size of value passed to targetShrinkDemandedConstant is not 32 or 64 (PR #123084)

[Will Froom via llvm-commits]

================
@@ -0,0 +1,22 @@
+; RUN: llc -o - %s
----------------
WillFroom wrote:

Done

https://github.com/llvm/llvm-project/pull/123084