[llvm] [llvm][ARM][CodeGen] Disable MEMCPY LDM/STM inlining for v7-m (PR #106378)

[David Spickett via llvm-commits]

DavidSpickett wrote:

Drive by comment: The PR description is missing a "why". Disable this on v7-m because... because it's slow, because it's incompatible, whatever the reason is.

https://github.com/llvm/llvm-project/pull/106378