On Hikey960 if outputs GPIO176 low level, it can tell PMIC to power off
the whole board.  To avoid resetting the board and stay off, it also
requires the SW2201's three switches 1/2/3 need to be all set to 0.

Since current code doesn't contain complete GPIO modules and misses to
support GPIO176.  This patch adds all known GPIO modules and initialize
GPIO in BL31, and adds system power off callback to use GPIO176 for PMIC
power off operation.

Change-Id: Ia88859b8b7c87c061420ef75f0de3e2768667bb0
Signed-off-by: Leo Yan <leo.yan@linaro.org>

Enforce full include path for includes. Deprecate old paths.

The following folders inside include/lib have been left unchanged:

- include/lib/cpus/${ARCH}
- include/lib/el3_runtime/${ARCH}

The reason for this change is that having a global namespace for
includes isn't a good idea. It defeats one of the advantages of having
folders and it introduces problems that are sometimes subtle (because
you may not know the header you are actually including if there are two
of them).

For example, this patch had to be created because two headers were
called the same way: e0ea0928d5b7 ("Fix gpio includes of mt8173 platform
to avoid collision."). More recently, this patch has had similar
problems: 46f9b2c3a282 ("drivers: add tzc380 support").

This problem was introduced in commit 4ecca33988b9 ("Move include and
source files to logical locations"). At that time, there weren't too
many headers so it wasn't a real issue. However, time has shown that
this creates problems.

Platforms that want to preserve the way they include headers may add the
removed paths to PLAT_INCLUDES, but this is discouraged.

Change-Id: I39dc53ed98f9e297a5966e723d1936d6ccf2fc8f
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

GPIO_089 connects to PCIE_PERST_N. It needs to be configured as
output low.

Signed-off-by: Kaihua Zhong <zhongkaihua@huawei.com>
Signed-off-by: Xiaowei Song <songxiaowei@hisilicon.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>

Create hikey960_bl_common.c to store duplication initialization
code in both BL1 and BL2.

Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>