Deprecation/removal of nios2 target support

[Joseph Myers]

On Wed, 17 Apr 2024, Sandra Loosemore wrote:

> Therefore I'd like to mark Nios II as obsolete in GCC 14 now, and remove
> support from all toolchain components after the release is made.  I'm not sure
> there is an established process for obsoleting/removing support in other
> components; besides binutils, GDB, and GLIBC, there's QEMU, newlib/libgloss,
> and the Linux kernel.  But, we need to get the ball rolling somewhere.

CC:ing Arnd Bergmann regarding the obsolescence in the Linux kernel.

-- 
Joseph S. Myers
josmyers@redhat.com