[PATCH][GCC 9] AArch64: Add rng feature to Neoverse V1

[Kyrylo Tkachov via Gcc-patches]

Hi all,

This patch adds the +rng feature to the Neoverse V1 entry. It exists in the GCC 
11 and 10 branches, but was missed out on GCC 9 and 8 as those didn't support 
the rng intrinsic then, but they do now.

Bootstrapped and tested on aarch64-none-linux-gnu.
Committing to GCC 9 and an appropriate backport to GCC 8 later.

Thanks,
Kyrill

gcc/
        * config/aarch64/aarch64-cores.def (zeus): Add AARCH64_FL_RNG to 
features.
        (neoverse-v1): Likewise.

rng-9.patch
Description: rng-9.patch