[Bug lto/90523] lto1 segfault in arm_parse_cpu_option_name

[hoganmeier at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90523

--- Comment #1 from krux <hoganmeier at gmail dot com> ---
So this one must be null:
https://github.com/gcc-mirror/gcc/blob/65af043/gcc/config/arm/arm.c#L3148