ARMv7 Vexpress updates/cleanups for v4.18
1. Syntactic restructuring of motherboard include file so that it can be
included at the top of any other DTS file as it should be rather than
existing include in the middle of the file at a specific location
2. Use of standard GPIO controller bindings for few sysreg components
like LED, MMC Write Protect/Card Detect and Flash Write Protect
to fix some of the new DTC warnings
3. Cleanup to replace all underscores('_') with hyphens('-') in the
device node names
* tag 'vexpress-updates-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux:
ARM: dts: vexpress: replace '_' with '-' in node names
ARM: dts: vexpress: use standard gpio bindings for sys_{led,mci,flash}
ARM: dts: vexpress: Restructure motherboard includes
Signed-off-by: Olof Johansson <olof@lixom.net>