[Bug target/61296] Excessive alignment in ix86_data_alignment

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61296

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
After r199898, DATA_ALIGNMENT is only for optimization purposes.
Align struct >= 64 bytes to 64 bytes may increase data size due
to excessive alignment.