Merge tag 'bcm2835-arm64-next-2016-07-03' into soc-arm64/next

This pull request brings in the build support for the Raspberry Pi arm64
port. This has an external dependency on Jason Cooper's irqchip/bcm
branch, it is a stable branch based on v4.7-rc1, and it has been in
-next for a couple of weeks.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>