video: Add Meson Video Processing Unit Driver

This adds video output support for Amlogic GXBB/GXL/GXM chips.
The supported ports are CVBS and HDMI (based on DW_HDMI).

When using HDMI, only DMT modes are supported.

There is support for simple-framebuffer (CONFIG_VIDEO_DT_SIMPLEFB)

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Jorge Ramire-Ortiz <jramirez@baylibre.com>
Signed-off-by: Maxime Jourdan <mjourdan@baylibre.com>
[narmstrong: fixed defines alignment in meson_canvas.c]
Reviewed-by: Anatolij Gustschin <agust@denx.de>
diff --git a/drivers/video/meson/Kconfig b/drivers/video/meson/Kconfig
new file mode 100644
index 0000000..0c9ddeb
--- /dev/null
+++ b/drivers/video/meson/Kconfig
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2018 BayLibre, SAS
+#
+# Author: Neil Armstrong <narmstrong@baylibre.com>
+
+config VIDEO_MESON
+	bool "Enable Amlogic Meson video support"
+	depends on DM_VIDEO
+	select DISPLAY
+	help
+	  Enable Amlogic Meson Video Processing Unit video support.