sysutils/atf-allwinner

Add a new atf-master master port. ARM Arm Trusted Framework (sometimes called TF-A for reasons ...) provides a reference implementation of secure world software for Armv7-A and Armv8-A, including a Secure Monitor executing at Exception Level 3 (EL3).

We had a port for Alwinner A64/H5 chip, but we need to introduced more ports.
So convert this to a master/slave port scheme like u-boot.

atf-allwinner is now badly named, when it was introduced it only support A64,
now it both support A64 and H5 and there is another ATF platform for H6.
Rename it with the platform name

Remove MASTER_SITES=GH when it is the only one.

It is added by USE_GITHUB.  Tested with `make makesum` not changing distinfo.

sysutils/atf-allwinner: Mark the port as NO_ARCH

It's a cross compiled firmware for aarch64, mark it as NO_ARCH
While here pet portlint.

Approved by:	bapt (mentor, implicit)

sysutils/atf-allwinner: Switch to main repository

Switch to main repository as all the allwinner code have been merge there.
The latest release doesn't have allwinner code so use a commit that is known
to work.

Approved by:	bapt (mentor)
Differential Revision:	https://reviews.freebsd.org/D18313

sysutils/atf-allwinner: Update to latest upstream

This brings a few patches for Pinebook and TERES-1

Tested-On: Pinebook
Tested-On: Pine64
Tested-On: Pine64-LTS

Approved by:	bapt (mentor)
Differential Revision:	https://reviews.freebsd.org/D17412

Update MAINTAINER: use @FreeBSD.org

Adjust license.

PR:		222557
Submitted by:	maintainer

Update to 20180112.

Differential Revision:	D14297
Submitted by:		manu

Bump PORTREVISIONs of all users of math/mpc that we just updated to version 1.1.0 (via revision 464079).

sysutils/atf-allwinner: Update to 20171017

Reviewed by:	bapt
Approved by:	bapt
Differential Revision:	https://reviews.freebsd.org/D13560

Add sysutils/atf-allwinner: ARM trusted Framework for Allwinner 64 bit SoCs.

PR:		221053
Submitted by:	manu