[Bug target/112643] [14 regression] including x86intrin.h is broken for -march=native (which adds -mno-avx10.1-256 )

[haochen.jiang at intel dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112643

--- Comment #23 from Haochen Jiang <haochen.jiang at intel dot com> ---
I have root caused the issue and also discovered some other minor problems
unrelated to this PR but hard to discover.

I will write a patch to fix all of them.