arch-armv8-5a.inc: Add tune include for armv8.5a

This adds support for the armv8.5a architecture and the crypto
extension.

(From OE-Core rev: 0cb1a6d9)

Signed-off-by: Kevin Hao <kexin.hao@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
[Kevin: Convert to the old style override syntax]
Signed-off-by: Kevin Hao <kexin.hao@windriver.com>
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>