arm64: dts: msm8994 SoC and Huawei Angler (Nexus 6P) support

Initial device tree support for Qualcomm MSM8994 SoC and
Huawei Angler / Google Nexus 6P support.

The device tree is based on the Google 3.10 kernel tree.

The device can be booted into the initrd with only one CPU running.

Signed-off-by: Bastian Köcher <mail@kchr.de>
[jeremymc@redhat.com: removed Kconfig, defconfig, move from Huawei to qcom dir]
Signed-off-by: Jeremy McNicoll <jeremymc@redhat.com>
Tested-by: Michael Scott <michael.scott@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>