Add an i.MX8 (aarch64) device spec

Not much different from i.MX6, apart from switching to aarch64 and the
appropriate tune flags.

[ChangeLog][Platform Specific Changes][Linux] Added a device spec for
64-bit i.MX8 systems (Vivante graphics stack)

Change-Id: I1fe939fca87d5f3031cefbf43fa359aeeaf44752
Reviewed-by: Andy Nichols <andy.nichols@qt.io>

mkspecs/devices/linux-imx8-g++/qmake.conf

@@ -0,0 +1,41 @@
+#
+# qmake configuration for the NXP i.MX8 based boards (64-bit)
+#
+# The configuration below is set up for running with the fbdev-style
+# Vivante graphics stack. (so eglfs with the eglfs_viv backend, no
+# direct drm use via eglfs_kms)
+
+# Wayland should also be functional. However, when writing Wayland
+# *compositors* with Qt, the eglfs backend will have to be switched to
+# eglfs_viv_wl by setting the QT_QPA_EGLFS_INTEGRATION environment
+# variable.
+#
+# Below is an example configure line that assumes there is an AArch64
+# toolchain and sysroot available in $HOME/imx8. On device Qt is
+# expected to be placed under /usr/local/qt514 whereas on the host
+# 'make install' will copy the host tools and the target libraries to
+# $HOME/imx8/qt5.
+#
+# ./configure -release -opengl es2 -device linux-imx8-g++ \
+#   -device-option CROSS_COMPILE=~/imx8/toolchain/x86_64-pokysdk-linux/usr/bin/aarch64-poky-linux/aarch64-poky-linux- \
+#   -sysroot ~/imx8/sysroot \
+#   -opensource -confirm-license -make libs -prefix /usr/local/qt514 -extprefix ~/imx8/qt5 -v
+
+include(../common/linux_device_pre.conf)
+
+QMAKE_LIBS_EGL         += -lEGL
+QMAKE_LIBS_OPENGL_ES2  += -lGLESv2 -lEGL -lGAL
+QMAKE_LIBS_OPENVG      += -lOpenVG -lEGL -lGAL
+
+IMX8_CFLAGS             = -march=armv8-a -mtune=cortex-a72.cortex-a53 -DLINUX=1 -DEGL_API_FB=1
+QMAKE_CFLAGS           += $$IMX8_CFLAGS
+QMAKE_CXXFLAGS         += $$IMX8_CFLAGS
+
+DISTRO_OPTS += aarch64
+
+# Preferred eglfs backend
+EGLFS_DEVICE_INTEGRATION = eglfs_viv
+
+include(../common/linux_arm_device_post.conf)
+
+load(qt_config)

mkspecs/devices/linux-imx8-g++/qplatformdefs.h

@@ -0,0 +1,40 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the qmake spec of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "../../linux-g++/qplatformdefs.h"