Hi all,

This patch adds initial support for the Cortex-A73 processor through the
cortex-a73, cortex-a73.cortex-a35 and cortex-a73.cortex-a53 arguments to -mcpu and -mtune.

The Cortex-A73 is an ARMv8-A processor.

Bootstrapped and tested on arm-none-linux-gnueabihf with an appropriately
patched binutils that understands the relevant -mcpu argument.

Ok for trunk?

Thanks,
Kyrill

2016-06-06  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

     * config/arm/arm.c (arm_cortex_a73_tune): New struct.
     * config/arm/arm-cores.def (cortex-a73): New entry.
     (cortex-a73.cortex-a35): Likewise.
     (cortex-a73.cortex-a53): Likewise.
     * config/arm/arm-tables.opt: Regenerate.
     * config/arm/arm-tune.md: Likewise.
     * config/arm/bpabi.h (BE8_LINK_SPEC): Handle mcpu=cortex-a73,
     mcpu=cortex-a73.cortex-a35 and mcpu=cortex-a73.cortex-a53.
     * config/arm/t-aprofile: Handle mcpu=cortex-a73,
     mcpu=cortex-a73.cortex-a35 and mcpu=cortex-a73.cortex-a53.
     * doc/invoke.texi (ARM Options): Document cortex-a73,
     cortex-a73.cortex-a35 and cortex-a73.cortex-a53.