Add out4.ru O4-iMX-NANO board

Board designed for quick prototyping and has one microSD port,
2 Ethernet ports, 2 USB ports, I2C, SPI, CAN, RS-485, GPIO,
UART interfaces, and 2 RGB LEDs.

Signed-off-by: Oleh Kravchenko <oleg@kaa.org.ua>
Cc: Stefano Babic <sbabic@denx.de>
diff --git a/MAINTAINERS b/MAINTAINERS
index 86ff5e0..875eb5d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -919,6 +919,16 @@
 T:	git https://source.denx.de/u-boot/custodians/u-boot-onenand.git
 F:	drivers/mtd/onenand/
 
+OUT4-IMX6ULL-NANO BOARD
+M:	Oleh Kravchenko <oleg@kaa.org.ua>
+S:	Maintained
+T:	git https://github.com/Oleh-Kravchenko/u-boot-out4.git
+F:	arch/arm/dts/o4-imx-nano.dts
+F:	arch/arm/dts/o4-imx6ull-nano.dtsi
+F:	board/out4
+F:	configs/o4-imx6ull-nano_defconfig
+F:	include/configs/o4-imx6ull-nano.h
+
 PATMAN
 M:	Simon Glass <sjg@chromium.org>
 S:	Maintained