[Bug target/68263] Vector "*mov_internal" fails to handle misaligned load/store from reload

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68263

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
The maximum stack alignment is 4 byte for IA MCU.  That is why
reload generates misaligned load/store.