video: add nexell video driver (display/video driver)

Changes in relation to FriendlyARM's U-Boot nanopi2-v2016.01:
- nexell_display.c: Changed to DM, CONFIG_FB_ADDR can not be used
  anymore because framebuffer is allocated by video_reserve() in
  video-uclass.c. Therefore code changed appropriately.
- '#ifdef CONFIG...' changed to 'if (IS_ENABLED(CONFIG...))' where
  possible (and similar).
- livetree API (dev_read_...) is used instead of fdt one (fdt...).

Signed-off-by: Stefan Bosch <stefan_b@posteo.net>
diff --git a/drivers/video/nexell/Makefile b/drivers/video/nexell/Makefile
new file mode 100644
index 0000000..111ab45
--- /dev/null
+++ b/drivers/video/nexell/Makefile
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2016 Nexell
+# Junghyun, kim<jhkim@nexell.co.kr>
+
+obj-$(CONFIG_VIDEO_NX) += s5pxx18_dp.o
+obj-$(CONFIG_VIDEO_NX) += soc/
+
+obj-$(CONFIG_VIDEO_NX_RGB)  += s5pxx18_dp_rgb.o
+obj-$(CONFIG_VIDEO_NX_LVDS) += s5pxx18_dp_lvds.o
+obj-$(CONFIG_VIDEO_NX_MIPI) += s5pxx18_dp_mipi.o
+obj-$(CONFIG_VIDEO_NX_HDMI) += s5pxx18_dp_hdmi.o