Hi all,

The neoversen1 tuning struct gives better performance on the Cortex-A76, 
so use that.
The only difference from the current tuning is the function and label 
alignment settings.

This gives about 1.3% improvement on SPEC2006 int and 0.3% on SPEC2006 fp.

Tested on aarch64-none-elf.

Ok for trunk?
Thanks,
Kyrill

2019-07-31  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

     * config/aarch64/aarch64-cores.def (cortex-a76): Use neoversen1 tuning
     struct.