bus: NVIDIA Tegra ACONNECT support
Adds support for the Tegra ACONNECT bus that's used to access the APE
(audio processing engine) on Tegra X1.
* tag 'tegra-for-4.8-bus' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
bus: Add support for Tegra ACONNECT
dt-bindings: bus: Add documentation for Tegra210 ACONNECT
Signed-off-by: Olof Johansson <olof@lixom.net>